When uploading MIB files to the UI the MIB may fail to compile if a supporting MIB file is not found. In this case it is prompting for the same MIB being uploaded.
Error: Failed to find mib module for <MIB>
Another MIB file uploaded previously contains the MIB file being uploaded
In the MIB file you are uploading it will have a line like the following near the top:
NAME-OF-MIB-HERE-MIB DEFINITIONS ::= BEGIN
On the Data Aggregator:
1) cd <DataAggregatorInstallDirectory>/apache-karaf-*.*.*/MIBDepot
grep "NAME-OF-MIB-HERE-MIB DEFINITIONS" *
3) If another file exists with the same line, remove the file from the Basic Vendor Certification UI upload dialog
before uploading the MIB file again.