How I can set value for a IBA on WTPartReferenceLink and WTPartDescribeLink

[AF_10478098]

I am using Windchill PDMLink Release 12.1 and Datecode with CPS 12.1.0.0

I have added an IBA attribute (string type) on both WTPartDescribeLink and WTPartReferenceLink. I can view it but a can't change his value.
I can't change the interface so that it shows me the attribute when creating the link WTPart-WTDocument

[Catalina]

Hi @AF_10478098 

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