I have developed a processing script in qgis which calls and solves an optimization model. The solver is glpk. However, access to the solver does not seem to work, neither via the relative nor via the absolute path. The solver is recognized via my normal Python environment, but not via QGIS.The glpk folder is available to me as an already installed folder with glpsol.exe. I have not installed it myself. However, it works for my colleague.