Hello Umberto,
I ran the error logging in P3Dv4 and found a duplicate numbering issue in the sim.cfg of FSDT_Pallet:
[fltsim.12]
title=FSDT_Pallet_A1N
sim=
model=SAA
texture=SAA
couatl.condition = %(ULDCode)r == 'A1N'
couatl.length = 2.237
[fltsim.12]
title=FSDT_ULD_AKC_2serve
model=AKC
texture=AKC_2serve
couatl.condition = %(ULDCode)r == 'AKC'
couatl.icaoprefixes=LC
couatl.atc_parking_codes=2serve
couatl.length=2.369
Also the model and texture are SAA, shouldn't it be A1N?
I have renumbered/adjusted the file, but after running the LiveUpdate the old file is overwritten again. I have attached my updated file here.