Last week we updated our installshield software (license server, SAB, local developer software) from 2011 version to 2018.

With the help of the support services of flexera our upgrade went well.
Our current installscript project is compiling without any issue but when running our setup we are facing issues.

This statement was working fine in 2011 but now anymore

nResult = LaunchAppEx("cmd.exe /c", szCmdLine, WAIT, SW_HIDE, CmdTimeOut, nExitCode, FALSE);

after searching for days we can't find anything why this wasn't working anymore on 2018.

Anybody any idea?

thanks in advance?