DANB,
thank you, but ... what are you talking about?

1) in the example folder (C:\ProgramData\Intergraph CAS\CAESAR II\10.00\Examples, as indicated in CII help) an example file called RELIEF without extension exists (please check better in the folder, i'm sure you find it in all last installed version of caesarii) i've attached it here

2) the file generated from the spectrum generator seems not to be compatible with the time hystory "FORCE-TIME" dialog (neither with earthquake . if you want, i've attached the two file, try to read it in a "FORCE-TIME" dialog. i have no success (one row blank, and other errors)

3) please note... i'm asking about "TIME HISTORY", not "EARTHQUAKE (SPECTRUM)"