topic Re: I have a problem when I release 'ExternalGlobalId' in Archicad C++ API

I have a problem when I release 'ExternalGlobalId'

YONGWOO KIM — Thu, 10 Apr 2025 08:17:19 GMT

I have some problem to get 'ExternalGlobalId' and 'GlobalId' in ArchiCAD28.

I want to get 'ExternalGlobalId', if there 'ExternalGlobalId' is exist.

And, if 'ExternalGlobalId' is not exist, I want to get 'GlobalId'.

An error occurs when exiting the for loop.

Occurs only when 'ExternalGlobalId' is not present.

In 'Microsoft Visual Studio\2019\Professional\VC\ToolsMSVC\14.29.30133\include\xmemory'.

0xC0000005: Access violation reading location 0xFFFFFFFFFFFFFFFF

This is my code.

for (int i = 0; i < selList.GetSize(); i++) { UniString ifcType = L"", ifcIdStr = L""; API_Elem_Head elemHead; elemHead.guid = selList[i].GetGuid(); ACAPI_Element_GetHeader(&elemHead); auto objectID = IFCAPI::GetObjectAccessor().CreateElementObjectID(elemHead); auto ifcTypeResult = IFCAPI::GetObjectAccessor().GetIFCType(objectID.Unwrap()); if (ifcTypeResult.IsOk()) ifcType = ifcTypeResult.Unwrap(); auto externalGlobalId(IFCAPI::GetObjectAccessor().GetExternalGlobalId(objectID.Unwrap())); if (externalGlobalId.IsOk()) { ifcIdStr = externalGlobalId.Unwrap(); } else { auto globalId = IFCAPI::GetObjectAccessor().GetGlobalId(objectID.Unwrap()); if (globalId.IsOk()) ifcIdStr = globalId.Unwrap(); } }

Re: I have a problem when I release 'ExternalGlobalId'

Adam Toth — Thu, 15 May 2025 06:40:33 GMT

Does this occur with a Debug, or Release/RelWithDebInfo Add-On build?
I've seen stg. similar, when using a Debug AddOn with an Archicad release, while it worked with the Rel-Rel combination.

Re: I have a problem when I release 'ExternalGlobalId'

YONGWOO KIM — Mon, 19 May 2025 06:29:12 GMT

It solved with Release.

However, is there any plan to fix it in the future?

Re: I have a problem when I release 'ExternalGlobalId'

BerndSchwarzenbacher — Tue, 20 May 2025 14:21:21 GMT

I had a similar issue a while ago. You can change your Debug build setup a little bit to get rid of the issue in Debug builds.
Graphisoft now discourages using ACAP_STATD.lib. Instead you should always link to ACAP_STAT.lib also in Debug build and set the ITERATOR_DEBUG_LEVEL=0. After changing these two things, I didn't have any issues anymore in debug mode and attaching a debugger works as well still.

More details here: https://community.graphisoft.com/t5/Archicad-C-API/Crash-for-GetOrganizationIds-in-DEBUG-builds-linked-to-ACAP/m-p/646853/highlight/true#M10095