Gaussian 09: missing checkfile

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.

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