VBCall not working on one PC

VBCall not working on one PC: Our CallVB statement doesn't work on one of the PCs, but it works on others. In GuiXT profile the .NET class library directory is

\p18005\guixt\&database\classlibraries

A possible reason is that an older GuiXT version is active on this PC which fails to resolve the "&database" expression in the path. Update GuiXT to a 2015 version or above.

Another possible reason is not having Windows user rights for the class library folder.