TWBX cataloged from Tableau Server produces the following error AFTER the document is cataloged:
Failed to process TWBX 'C:\Program Files (x86)\InfoSol\InfoBurstPlatform_RTS\ib_cat_15254.twbx' :: No root TWB found
The same TWBX file cataloged from Network Share catalogs successfully.
This issue is under investigation.
This issue is resolved in InfoBurst Platform Build 235 Fix Pack 3.