To avoid copying the modal analysis files you can use the MODDIR command to point to the modal files . A typical sequence is shown below. This way you can run your harmonic analysis in a different directory but use the files from the modal anlaysis without copying them over.
/solu
antype,modal,restart ! restarting the modal analysis
modd,on,'C:\Users\cs\AppData\Local\Temp\WB_cs_19460_2\wbnew_files\dp0\SYS-2\MECH\',file
modcontrol,on
thexpand,off ! ignore thermal strains
mxpand,,,,yes,,no, ! expand element results, but not write them to file.mode
outres,erase
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