Windows 10 Environment Variables: why does variable replacement not work?
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On Windows 10 Pro:
I just downloaded and installed (i.e. unpacked) the latest Maven version into a directory in preparation of an upcoming development project. Then - as instructed - I defined me two environment variables:
M2=%M2_HOME%bin
M2_HOME=C:Program FilesApache Software Foundationapache-maven-3.6.0
But for some strange reason the former %-placeholder 'M2' is not processed, i.e. "set" just yields:
>set
...
M2=%M2_HOME%bin
M2_HOME=C:Program FilesApache Software Foundationapache-maven-3.6.0
...
I have OK-ed and closed the env-var dialog and the system settings dialog. I restarted a new cmd-shell, I even killed and restarted Windows Explorer (i.e. the desktop), which should definitely trigger a re-read and re-substitution of those variables, and then restarted cmd from that desktop again but M2 remains at the unsubstituted %M2_HOME%bin-value.
I also checked in the registry:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironmentM2 is defined as REG_EXPAND_SZ, so it should be evaluated and %-vars should be substituted, but obviously here they are not.
If I assign the very same value manually on the command line it is of course properly substituted as one would expect, but not by default via the env-var definition shown above.
So, what am I missing here? Why is this M2_HOME as part of the M2-value not properly substituted?
Edit: added this output on JosefZ's request:
C:Usersmmo>reg query "HKLMSYSTEMCurrentControlSetControlSession ManagerEnvironment" -v M2*
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironment
M2 REG_EXPAND_SZ %M2_HOME%bin
M2_HOME REG_EXPAND_SZ %ProgramFiles%Apache Software Foundationapache-maven-3.6.0
End of search: 2 match(es) found.
C:Usersmmo>reg query HKCUEnvironment -v M2*
End of search: 0 match(es) found.
C:Usersmmo>
windows-10 cmd.exe environment-variables
asked Feb 5 at 17:45
mmommo
1193
|
show 4 more comments
On Windows 10 Pro:
I just downloaded and installed (i.e. unpacked) the latest Maven version into a directory in preparation of an upcoming development project. Then - as instructed - I defined me two environment variables:
M2=%M2_HOME%bin
M2_HOME=C:Program FilesApache Software Foundationapache-maven-3.6.0
But for some strange reason the former %-placeholder 'M2' is not processed, i.e. "set" just yields:
>set
...
M2=%M2_HOME%bin
M2_HOME=C:Program FilesApache Software Foundationapache-maven-3.6.0
...
I have OK-ed and closed the env-var dialog and the system settings dialog. I restarted a new cmd-shell, I even killed and restarted Windows Explorer (i.e. the desktop), which should definitely trigger a re-read and re-substitution of those variables, and then restarted cmd from that desktop again but M2 remains at the unsubstituted %M2_HOME%bin-value.
I also checked in the registry:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironmentM2 is defined as REG_EXPAND_SZ, so it should be evaluated and %-vars should be substituted, but obviously here they are not.
If I assign the very same value manually on the command line it is of course properly substituted as one would expect, but not by default via the env-var definition shown above.
So, what am I missing here? Why is this M2_HOME as part of the M2-value not properly substituted?
Edit: added this output on JosefZ's request:
C:Usersmmo>reg query "HKLMSYSTEMCurrentControlSetControlSession ManagerEnvironment" -v M2*
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironment
M2 REG_EXPAND_SZ %M2_HOME%bin
M2_HOME REG_EXPAND_SZ %ProgramFiles%Apache Software Foundationapache-maven-3.6.0
End of search: 2 match(es) found.
C:Usersmmo>reg query HKCUEnvironment -v M2*
End of search: 0 match(es) found.
C:Usersmmo>
windows-10 cmd.exe environment-variables
asked Feb 5 at 17:45
mmommo
1193
2
What about simply reordering the vars, whenM2_HOMEisn't set how could it be substituted in the first command?
– LotPings
Feb 5 at 18:53
Please show us output fromreg query "HKLMSYSTEMCurrentControlSetControlSession ManagerEnvironment" -v M2*as well as fromreg query HKCUEnvironment -v M2*(copy&paste from acmdwindow.)
– JosefZ
Feb 5 at 19:42
@JosefZ: I added the result to my initial question above as the formatting gets garbled in these comments.
– mmo
Feb 6 at 6:51
2
@LotPings: not possible - they are automatically ordered alphabetically by the env-var dialog. And the order DOES seem to be an issue! I defined me a few more examples that refer to other env-vars further down (TestX=%TestY%test3, TestY=%TestZ%test2, TestZ=%JAVA_HOME%test1) and those are NOT correctly resolved, to! If I revert the order things work. So - it's indeed the order! IMHO that's a bug but I doubt I can convince MS on that...
– mmo
Feb 6 at 7:05
1
@LotPings: Could you please make that into an answer? Then I could give you credits. One apparently can't mark a comment as accepted answer.
– mmo
Feb 6 at 7:23
|
show 4 more comments
On Windows 10 Pro:
I just downloaded and installed (i.e. unpacked) the latest Maven version into a directory in preparation of an upcoming development project. Then - as instructed - I defined me two environment variables:
M2=%M2_HOME%bin
M2_HOME=C:Program FilesApache Software Foundationapache-maven-3.6.0
But for some strange reason the former %-placeholder 'M2' is not processed, i.e. "set" just yields:
>set
...
M2=%M2_HOME%bin
M2_HOME=C:Program FilesApache Software Foundationapache-maven-3.6.0
...
I have OK-ed and closed the env-var dialog and the system settings dialog. I restarted a new cmd-shell, I even killed and restarted Windows Explorer (i.e. the desktop), which should definitely trigger a re-read and re-substitution of those variables, and then restarted cmd from that desktop again but M2 remains at the unsubstituted %M2_HOME%bin-value.
I also checked in the registry:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironmentM2 is defined as REG_EXPAND_SZ, so it should be evaluated and %-vars should be substituted, but obviously here they are not.
If I assign the very same value manually on the command line it is of course properly substituted as one would expect, but not by default via the env-var definition shown above.
So, what am I missing here? Why is this M2_HOME as part of the M2-value not properly substituted?
Edit: added this output on JosefZ's request:
C:Usersmmo>reg query "HKLMSYSTEMCurrentControlSetControlSession ManagerEnvironment" -v M2*
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironment
M2 REG_EXPAND_SZ %M2_HOME%bin
M2_HOME REG_EXPAND_SZ %ProgramFiles%Apache Software Foundationapache-maven-3.6.0
End of search: 2 match(es) found.
C:Usersmmo>reg query HKCUEnvironment -v M2*
End of search: 0 match(es) found.
C:Usersmmo>
windows-10 cmd.exe environment-variables
asked Feb 5 at 17:45
mmommo
1193
On Windows 10 Pro:
I just downloaded and installed (i.e. unpacked) the latest Maven version into a directory in preparation of an upcoming development project. Then - as instructed - I defined me two environment variables:
M2=%M2_HOME%bin
M2_HOME=C:Program FilesApache Software Foundationapache-maven-3.6.0
But for some strange reason the former %-placeholder 'M2' is not processed, i.e. "set" just yields:
>set
...
M2=%M2_HOME%bin
M2_HOME=C:Program FilesApache Software Foundationapache-maven-3.6.0
...
I have OK-ed and closed the env-var dialog and the system settings dialog. I restarted a new cmd-shell, I even killed and restarted Windows Explorer (i.e. the desktop), which should definitely trigger a re-read and re-substitution of those variables, and then restarted cmd from that desktop again but M2 remains at the unsubstituted %M2_HOME%bin-value.
I also checked in the registry:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironmentM2 is defined as REG_EXPAND_SZ, so it should be evaluated and %-vars should be substituted, but obviously here they are not.
If I assign the very same value manually on the command line it is of course properly substituted as one would expect, but not by default via the env-var definition shown above.
So, what am I missing here? Why is this M2_HOME as part of the M2-value not properly substituted?
Edit: added this output on JosefZ's request:
C:Usersmmo>reg query "HKLMSYSTEMCurrentControlSetControlSession ManagerEnvironment" -v M2*
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerEnvironment
M2 REG_EXPAND_SZ %M2_HOME%bin
M2_HOME REG_EXPAND_SZ %ProgramFiles%Apache Software Foundationapache-maven-3.6.0
End of search: 2 match(es) found.
C:Usersmmo>reg query HKCUEnvironment -v M2*
End of search: 0 match(es) found.
C:Usersmmo>
windows-10 cmd.exe environment-variables
windows-10 cmd.exe environment-variables
asked Feb 5 at 17:45
mmommo
1193
asked Feb 5 at 17:45
mmommo
1193
edited Feb 6 at 6:54
mmo
asked Feb 5 at 17:45
mmommo
1193
asked Feb 5 at 17:45
mmommo
1193
asked Feb 5 at 17:45
mmommo
1193
1193
2
What about simply reordering the vars, whenM2_HOMEisn't set how could it be substituted in the first command?
– LotPings
Feb 5 at 18:53
Please show us output fromreg query "HKLMSYSTEMCurrentControlSetControlSession ManagerEnvironment" -v M2*as well as fromreg query HKCUEnvironment -v M2*(copy&paste from acmdwindow.)
– JosefZ
Feb 5 at 19:42
@JosefZ: I added the result to my initial question above as the formatting gets garbled in these comments.
– mmo
Feb 6 at 6:51
2
@LotPings: not possible - they are automatically ordered alphabetically by the env-var dialog. And the order DOES seem to be an issue! I defined me a few more examples that refer to other env-vars further down (TestX=%TestY%test3, TestY=%TestZ%test2, TestZ=%JAVA_HOME%test1) and those are NOT correctly resolved, to! If I revert the order things work. So - it's indeed the order! IMHO that's a bug but I doubt I can convince MS on that...
– mmo
Feb 6 at 7:05
1
@LotPings: Could you please make that into an answer? Then I could give you credits. One apparently can't mark a comment as accepted answer.
– mmo
Feb 6 at 7:23
|
show 4 more comments
2
What about simply reordering the vars, whenM2_HOMEisn't set how could it be substituted in the first command?
– LotPings
Feb 5 at 18:53
Please show us output fromreg query "HKLMSYSTEMCurrentControlSetControlSession ManagerEnvironment" -v M2*as well as fromreg query HKCUEnvironment -v M2*(copy&paste from acmdwindow.)
– JosefZ
Feb 5 at 19:42
@JosefZ: I added the result to my initial question above as the formatting gets garbled in these comments.
– mmo
Feb 6 at 6:51
2
@LotPings: not possible - they are automatically ordered alphabetically by the env-var dialog. And the order DOES seem to be an issue! I defined me a few more examples that refer to other env-vars further down (TestX=%TestY%test3, TestY=%TestZ%test2, TestZ=%JAVA_HOME%test1) and those are NOT correctly resolved, to! If I revert the order things work. So - it's indeed the order! IMHO that's a bug but I doubt I can convince MS on that...
– mmo
Feb 6 at 7:05
1
@LotPings: Could you please make that into an answer? Then I could give you credits. One apparently can't mark a comment as accepted answer.
– mmo
Feb 6 at 7:23
2
2
What about simply reordering the vars, when
M2_HOME isn't set how could it be substituted in the first command?– LotPings
Feb 5 at 18:53
What about simply reordering the vars, when
M2_HOME isn't set how could it be substituted in the first command?– LotPings
Feb 5 at 18:53
Please show us output from
reg query "HKLMSYSTEMCurrentControlSetControlSession ManagerEnvironment" -v M2* as well as from reg query HKCUEnvironment -v M2* (copy&paste from a cmd window.)– JosefZ
Feb 5 at 19:42
Please show us output from
reg query "HKLMSYSTEMCurrentControlSetControlSession ManagerEnvironment" -v M2* as well as from reg query HKCUEnvironment -v M2* (copy&paste from a cmd window.)– JosefZ
Feb 5 at 19:42
@JosefZ: I added the result to my initial question above as the formatting gets garbled in these comments.
– mmo
Feb 6 at 6:51
@JosefZ: I added the result to my initial question above as the formatting gets garbled in these comments.
– mmo
Feb 6 at 6:51
2
2
@LotPings: not possible - they are automatically ordered alphabetically by the env-var dialog. And the order DOES seem to be an issue! I defined me a few more examples that refer to other env-vars further down (TestX=%TestY%test3, TestY=%TestZ%test2, TestZ=%JAVA_HOME%test1) and those are NOT correctly resolved, to! If I revert the order things work. So - it's indeed the order! IMHO that's a bug but I doubt I can convince MS on that...
– mmo
Feb 6 at 7:05
@LotPings: not possible - they are automatically ordered alphabetically by the env-var dialog. And the order DOES seem to be an issue! I defined me a few more examples that refer to other env-vars further down (TestX=%TestY%test3, TestY=%TestZ%test2, TestZ=%JAVA_HOME%test1) and those are NOT correctly resolved, to! If I revert the order things work. So - it's indeed the order! IMHO that's a bug but I doubt I can convince MS on that...
– mmo
Feb 6 at 7:05
1
1
@LotPings: Could you please make that into an answer? Then I could give you credits. One apparently can't mark a comment as accepted answer.
– mmo
Feb 6 at 7:23
@LotPings: Could you please make that into an answer? Then I could give you credits. One apparently can't mark a comment as accepted answer.
– mmo
Feb 6 at 7:23
|
show 4 more comments
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2
What about simply reordering the vars, when
M2_HOMEisn't set how could it be substituted in the first command?– LotPings
Feb 5 at 18:53
Please show us output from
reg query "HKLMSYSTEMCurrentControlSetControlSession ManagerEnvironment" -v M2*as well as fromreg query HKCUEnvironment -v M2*(copy&paste from acmdwindow.)– JosefZ
Feb 5 at 19:42
@JosefZ: I added the result to my initial question above as the formatting gets garbled in these comments.
– mmo
Feb 6 at 6:51
2
@LotPings: not possible - they are automatically ordered alphabetically by the env-var dialog. And the order DOES seem to be an issue! I defined me a few more examples that refer to other env-vars further down (TestX=%TestY%test3, TestY=%TestZ%test2, TestZ=%JAVA_HOME%test1) and those are NOT correctly resolved, to! If I revert the order things work. So - it's indeed the order! IMHO that's a bug but I doubt I can convince MS on that...
– mmo
Feb 6 at 7:05
1
@LotPings: Could you please make that into an answer? Then I could give you credits. One apparently can't mark a comment as accepted answer.
– mmo
Feb 6 at 7:23