It seems the problem comes from mame 0.141 dat:
The game 3bagflvt is defined as follow:
<game name="3bagflvt" sourcefile="aristmk4.c" sampleof="aristmk4">
Samples are supposed to come from aristmk4 file, and this file is not defined anywhere in the dat.
Note that the same problem occurs for aristmk5 with romof tag:
<game name="indiandr" sourcefile="aristmk5.c" romof="aristmk5">
I'm afraid there is nothing to do but waiting the next release and maybe post a msg to the mame team.