It worked fine with Archicad29 INT version (build 3000).The same add-on fails with Archicad29 JPN version (build 3000) and returns error -7003.Is this a problem limited to Archicad29 JPN?Please check.

Thank you for checking. The compiler version I'm using here is 19.44.35222.Also, the debug build's _ITERATOR_DEBUG_LEVEL is set to 0 in the preprocessor definition, as shown in the attached image. Thinking that there might be a problem with the project configuration, I porte...

Thinking that the problem might be due to differences in the initialization of API_FileOpenPers or the way files are handled, I created an add-on using only the code you provided and ran it, but I still received error -7003.I'm very sorry for not mentioning this in my initia...

By the way, the attached IFC file I'm using is just random data for experimental purposes, but it is a proper IFC file that can be loaded by clicking "Open" in the UI. Thank you in advance.

>What happens if you don't specify the fileTypeID? The code should be able to derive that from the file extension. In this case, "err = ACAPI_ProjectOperation_Open(&fop);" will return "APIERR_BADPARS" and nothing will happen. If "APIFType_IfcFile" is specified, a progress di...