I'm guess, you're trying to convert wchar_t to char directly somewhere, like using ProWstringToString. You cannot convert encoding this way. Use WideCharToMultiByte function (or similar) before applying this wide string value (of ProPath) to other Toolkit function wich consume narrow char (multibyte).
But there may be many aother reasons, e.g. depending on the Character Set of the project, even the encoding of the source files (such as text files and %s vs %w formatting). Hard to guess, if you don't share any information (piece of code e.g.).
ProMdlOriginGet itself work correctly (example):
PZ
