Urgent help needed : Toolkit : renaming an assembly adds in invalid external reference

Hello

I have a positive results.What I have done is as below:

-Open assembly manually having only one part

- Use code to get current mdl, rename it with suffix as _1 , save mdl, close window and do erase not displayed.

- Use code to retrive new (first renamed) mdl, rename it with suffix as _2 , save mdl, close window and do erase not displayed.

Manually checked and able to open second renamed assembly.

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ProError status = PRO_TK_GENERAL_ERROR;

//get current mdl
ProMdl objMdl;
status = ProMdlCurrentGet(&objMdl);

//Get name
ProName objName;
status = ProMdlNameGet(objMdl,objName);

//prepare first new name
ProName objNameFirst;
ProWstringCopy(objName,objNameFirst,PRO_VALUE_UNUSED);
ProWstringConcatenate(L"_1",objNameFirst,PRO_VALUE_UNUSED);

//first new name set
status = ProMdlnameRename(objMdl,objNameFirst);

//save model
status = ProMdlSave(objMdl);

//close current window
status = ProWindowCurrentClose();

//erase after first rename
status = ProMdlEraseAll(objMdl);

//Load first renamed model
ProMdl objMdlAfterFirst;
status = ProMdlnameRetrieve(objNameFirst,PRO_MDLFILE_ASSEMBLY,&objMdlAfterFirst);

//prepare second new name
ProName objNameSecond;
ProWstringCopy(objNameFirst,objNameSecond,PRO_VALUE_UNUSED);
ProWstringConcatenate(L"_2",objNameSecond,PRO_VALUE_UNUSED);

//second new name set
status = ProMdlnameRename(objMdlAfterFirst,objNameSecond);

//save model second rename
status = ProMdlSave(objMdlAfterFirst);

//close current window
status = ProWindowCurrentClose();

//erase after second rename
status = ProMdlEraseAll(objMdlAfterFirst);

return status;

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 Thanks and Regards

Ketan