Hi Hugo,
I have attached the short dump file MDG_CreateMaterial_ABAPRuntimeError.zip.
As the zip is not supported by scn site, I rename the MDG_CreateMaterial_ABAPRuntimeError.zip to MDG_CreateMaterial_ABAPRuntimeError.txt.
You can download it and rename it back to MDG_CreateMaterial_ABAPRuntimeError.zip.
Thank you for your help.