IfcMerge: merge error w/ IFCOWNERHISTORY

T by theoryshaw on 23 Jun 2024, edited 24 Jun 2024 #

I'm trying to merge the added_roof_members branch into main and i got the following error.

repo: https://hub.openingdesign.com/OpeningDesign/Lake_Kegonsa_Renovation

Is this something that can be worked around?


IFC Merge failed:

entity #3228822 attribute [5] conflict!

merge of Open/Models/BlenderBIM/Lake_Kegonsa_Renovation.ifc failed


main: 

#3228822=IFCOWNERHISTORY(#62226,#3228807,.READWRITE.,.MODIFIED.,1719155597,#62226,#3242208,1714410201);


added_roof_members:

#3228822=IFCOWNERHISTORY(#62226,#3228807,.READWRITE.,.MODIFIED.,1719093884,#62226,#3285618,1714410201);

T by theoryshaw on 23 Jun 2024 #

Further breakdown...


#3228822=IFCOWNERHISTORY(#62226,#3228807,.READWRITE.,.MODIFIED.,1719155597,#62226,#3242208,1714410201);

  #62226=IFCPERSONANDORGANIZATION(#62224,#62225,$);

    #62224=IFCPERSON($,'','ryan@openingdesign.com',$,$,$,$,$);

    #62225=IFCORGANIZATION($,'','',$,$);

  #3228807=IFCAPPLICATION(#3228806,'0.0.240419','BlenderBIM Add-on','BlenderBIM');

  #3242208=IFCAPPLICATION(#3242207,'0.0.240604','BlenderBIM Add-on','BlenderBIM');


#3228822=IFCOWNERHISTORY(#62226,#3228807,.READWRITE.,.MODIFIED.,1719093884,#62226,#3285618,1714410201);

  #62226=IFCPERSONANDORGANIZATION(#62224,#62225,$);

    #62224=IFCPERSON($,'','ryan@openingdesign.com',$,$,$,$,$);

    #62225=IFCORGANIZATION($,'','',$,$);

  #3228807=IFCAPPLICATION(#3228806,'0.0.240419','BlenderBIM Add-on','BlenderBIM');

  #3285618=IFCAPPLICATION(#3285617,'0.0.240605','BlenderBIM Add-on','BlenderBIM');

T by theoryshaw on 23 Jun 2024 #

I'm not 100% knowledgeable about IFCOWNERHISTORY, but it seems like the following should not have changed, if @chopinregis committed these changes--since the IfcPerson connected with that IFCOWNERHISTORY is me. #62224=IFCPERSON($,'','ryan@openingdesign.com',$,$,$,$,$);

https://hub.openingdesign.com/OpeningDesign/Lake_Kegonsa_Renovation/commit/4b909e498eeacbfc616f815c83497f6a629f595a#diff-36df8b75432c34fcd0a5fbf0ef0f218457d9b25a

B by brunopostle on 23 Jun 2024 # +2 votes

The BlenderBIM behaviour seems to be ok, the IfcOwnerHistory is updated with LastModifiedDate and LastModifyingApplication (though I would expect the LastModifyingUser to change too in this case). IfcOwnerHistory is kind-of useless, I've only ever tested with IFC4 files without IfcOwnerHistory so never saw this problem.

I think it would be safe for ifcmerge to simply clobber one or other attribute whenever there is a conflict in an IfcOwnerHistory. So I've pushed a change to ifcmerge that does this. I can't create an .exe today, will try and do this tomorrow.

T by theoryshaw on 24 Jun 2024 #

This is awesome.. thanks Bruno.

B by brunopostle on 24 Jun 2024 # +2 votes

@theoryshaw Updated ifcmerge.exe here: https://github.com/brunopostle/ifcmerge/releases/tag/2024-06-24