Re-Simulation fails from OMEdit with external libraries and Cpp

[rfranke]

Description

Re-simulation works under Linux. It fails under Windows. Take ExternalMedia as example. The contained test models use ExternalMediaLib.dll.

Steps to Reproduce

• Start OMEdit
• Set Tools -> Options -> Simulation -> Target Language to Cpp.
• Open ÈxternalMedia.Test.CoolProp.CO2.TestStatesSupercritical, simulate.
• Then press re-simulate button from plotting pane.

This raises the warning:

Failed to read the neccesary PATH values from
'C:/.../OpenModelica/OMEdit/ExternalMedia.Test.CoolProp.CO2.TestStatesSupercritical/TestStatesSupercritical.bat'
If simulation fails please check that you have the bat file and it is formatted correctly 

followed by the error

Simulation stopped with error in model factory: Failed loading System library!
C:\...\OpenModelica\OMEdit\ExternalMedia.Test.CoolProp.CO2.TestStatesSupercritical\OMCppTestStatesSupercritical.dll 

Expected Behavior

Re-simulation should run like the first simulation.

Version and OS

• OpenModelica Version: v1.22.0-dev-97-g721e7e1a28 (64-bit)
• OS: Windows 10, 64 bit
• ExternalMedia 4.0.0