MIB files need a specific format. When IMC imports the MIBs, it checks the formatting. Some systems have different levels of tolerance for bugs, so you might find that a file works with one NMS, but needs fixing for another NMS.
Two of these MIB files have some things that IMC does not like in their 'IMPORTS' section. It looks like this:
IMPORTS
MODULE-IDENTITY, OBJECT-IDENTITY, enterprises
FROM
SNMPv2-SMI;
IMC does not like that 'FROM' and 'SNMPv2-SMI' are on separate lines. You can edit it to look like this:
IMPORTS
MODULE-IDENTITY, OBJECT-IDENTITY, enterprises
FROM SNMPv2-SMI;
It looks like it's only ALCATEL-IND1-BASE.mib & ALCATEL-IND1-DEVICES.mib that have this problem. You can edit your copies of the files, or use the versions I've attached here.