ERROR SUMMARY

In an assigned pipe specification, there are several (mostly in the standard 150 sizes category) components where the following command line error appears.

ERROR from command line follows:
FLGW
Data not found. Current Project:'Inch_CS_Specs_2020_02.prj', Specification:'150', Main Nom=2.000, Red. Nom=1.000
Error reading data for component: Type=Flange Weld Neck Spec=150

QUESTION: Is there more than one factor that serves to produce the above error message?