ReadSegy fails after 502 calls

[billpramik]

Hi,
I have an Octave program that reads segy files, does a little crunching and then writes segy files. The problem I am having is that ReadSegy fails after exactly 502 calls to ReadSegy. It completes the 502nd call and then fails on the 503rd call with the following message: Each file being read has a single trace in it.

error: load: unable to open input file 'SegyMAT_Rev'
error: called from
GetSegyHeaderBasics at line 34 column 5
GetSegyHeader at line 91 column 15
ReadSegy at line 269 column 15
NotionalAddV07 at line 191 column 45

I am running Octave 5.1.0, have SegyMat-1.6 loaded on a Windows 10 machine

Any ideas?

Many thanks

Bill