get error while running staf with powershell cmdlets imported from custom application

[Nicolae Radulet]

Hi,
I am getting an error while trying to run a powershell cmdlet from a custom imported module using staf utility. If I start the powershell from command line and run same command without staf it is working fine, I get the desired output. This is the command with problem:

staf local process start shell "powershell -c %c" command "ipmo 'C:\Program Files\Tivoli\FlashcopyManager\FmModuleExc.dll';Get-DpExcConfig | out-file -FilePath C:\file.txt" wait returnstderr returnstdout workdir "C:\Program Files\Tivoli\flashcopymanager" sameconsole
Response

---

{
Return Code: 1
Key : <None>
Files :
{
Return Code: 0
Data :
}
{
Return Code: 0
Data : Get-DpExcConfig : Could not load file or assembly 'DpExcEngine,
Version=1.0.5373.15360, Culture=neutral, PublicKeyToken=null' or one of its
dependencies. The system cannot find the file specified.At line:1 char:65
+ ipmo 'C:\Program Files\Tivoli\FlashcopyManager\FmModuleExc.dll';Get-DpExcConfig ...
+
~~~~~~~~~~~~~~~
+ CategoryInfo : ReadError: (:) [Get-DpExcConfig, FileNotFoundEx
ception
+ FullyQualifiedErrorId : Get-DpExcConfig,IBM.Tivoli.TSM.Cmdlets.Exchange.
GetDpExcConfig

}

]
}

If I run this command then everything is ok

powershell -command "& {ipmo 'C:\Program Files\Tivoli\FlashcopyManager\FmModuleExc.dll';Get-DpExcConfig | out-file -FilePath C:\file.txt}"

Note: If I am using Powershell default modules from Microsoft using staf utility then everything is fine.
So my question is: It is something special that should be set up in Staf.cfg file in order to run successful a cmdlet imported from a custom module. So far I've updated the PsModulePath variable with the path to dll file, but it didn't work.

Any help related to this will be appreciated.

Thanks,
Nicolae Radulet