Awk Error - Help SOught Urgently

[Rahul Gopal Joshi]

Hello 

        I am a student technican in Texas A and M University. I am using Gnu
Awk (gawk) 2.15, patchlevel 5 for doing text processing. I have to process
about 5000 files, one after another, with each file containing about 200000
records. WHen I run the awk code, for batches of about 100 -150 files, it
runs fine., But when I try to run in on the entire list of 5000 files, it
breaks in between and gives the following error . 

        awk: Internal software error in the tostring function on .

         The input line number is 5. The file is channel_numtest.inp.
 The source line number is 66.

    ---- The source line number in the error message is different each time.

     If I run the code for the same file, at which halted, it goes through
fine. I tried to search the documentation but could not come across any
information about the above error message. Can you give me some insight of
what could be the problem ? 

------
Rahul Gopal Joshi 
Energy Systems Laboratory