In case you get an error message similar to the following one directly after initialization, it’s pretty sure an issue with your checkfile. Most probably it does not exist – and this is Gaussian’s way of telling you so. In any case, you can use the strace command to see what file is requested by Gaussian. As the output is rather lengthy, this will take some time. But in most cases it is faster then guessing, anyway. If you use strace, please make sure to follow the child processes of Gaussian, as well. On linux, the switch is -f.
FileIO operation on non-existent file.
FileIO: IOper= 2 IFilNo(1)=-20502 Len= 100 IPos= 4 Q= 98906272
dumping /fiocom/, unit = 1 NFiles = 14 SizExt = 524288 WInBlk = 512
defal = T LstWrd = 596480 FType=2 FMxFil=10000
Number 0 501 502 598 989 991 992 993
Base 180224 43520 72192 76800 44544 65536 65024 43008
End 596480 44520 76297 76802 64544 72098 65033 43208
End1 596480 44544 76800 77312 65024 72192 65536 43520
Wr Pntr 180224 43520 72192 76800 44544 65536 65024 43008
Rd Pntr 180224 43520 72192 76800 44544 72098 65033 43208
Length 416256 1000 4105 2 20000 6562 9 200
Number 994 995 996 997 998 999
Base 40448 42496 41472 41984 40960 77312
End 40478 42516 41672 42058 41160 179816
End1 40960 43008 41984 42496 41472 180224
Wr Pntr 40448 42496 41472 41984 40960 77312
Rd Pntr 40478 42516 41672 42055 41160 79816
Length 30 20 200 74 200 102504
dumping /fiocom/, unit = 2 NFiles = 1 SizExt = 0 WInBlk = 131072
defal = F LstWrd = 262144 FType=2 FMxFil=10000
Number 0
Base 131072
End 262144
End1 262144
Wr Pntr 131072
Rd Pntr 131072
Length 131072
dumping /fiocom/, unit = 3 NFiles = 1 SizExt = 524288 WInBlk = 512
defal = T LstWrd = 65536 FType=2 FMxFil=10000
Number 0
Base 40448
End 65536
End1 65536
Wr Pntr 40448
Rd Pntr 40448
Length 25088
Error termination in NtrErr:
NtrErr Called from FileIO.