iraf.net

I am trying to use the sptime task to determine the exposure time for a fiber bundle if used on the SOAR telescope in Chile. I have made up the relevant text files for specpars but when I try to run sptime I just get the following uninformative errorobsutil> sptime
ERROR: floating point invalid operationMaybe I'm not setting one of the parameters correctly? I'm just wondering if anyone has ever used sptime and maybe has come across this. The documentation is very helpful but I didn't see anything about common errors. Thanks!!

There are no known issues with the task and an 'invalid operand' error is something generic like an overflow condition. Could you please post the parameters/data files you used as well as the OS/IRAF version so we can try to reproduce it here?-Mike

Thanks for responding It looks like the problem occurs when I don't include wavelength and throughput information in a text file. The examples show some files without this information but I get the error if any of the text files don't include this.I got it to work by not including the file which I don't have this information for and just plugging in the values in specpars.