Imtiaz Gandikota
Ansys Employee

You can try couple of things: 

1. Use '/path/lspp48 -nographics c=' command instead of '/path/lspp48 runc='

2. Don't use slurm script to submit LSPP job. In LS-OPT stage solver command, enter below command and turn on "do not add input file argument". 

/sw/hprc/...../lspp48 -nographics c=LsPrepostOpt.inp