Hi Ron.

It seems like your integration is using a non standard projection “CPdmDataHandling.svc”. You will have to check with the functional consultant or developer who created it and check any documentation available associated to it in order to discover the reason for that error.

Additionally you need to review which is the action (GET, POST, PATCH, DELETE) and the body content if any. Maybe there is error in the way the URL is invoked.

Thank you much.

Best regards.
Gonzalo.

@Gonzalo Thank you.

we have this interface developed by IFS. not sure what is the technology behind the scene. 

from the error message body only, it tells us this part no is already exist in IFS, and it is serial controlled.

@ronhu As Gonzalo mentions above the CPdmDataHandling API you are using seems a non-standard API. Please check the implementation of that API as to why this specific error is raised. If you need to understand which Standard APIs can be used to update Engineering parts, please find the corresponding API in the API Explorer in the IFS Web Client. 

Further reading here (IFS Cloud 23R2 specific):
API Explorer - https://docs.ifs.com/techdocs/23r2/040_tailoring/300_extensibility/020_api_explorer/#api_explorer

REST APIs: https://docs.ifs.com/techdocs/23r2/040_tailoring/300_extensibility/240_integration/400_rest_apis/