Need Help in Fortran Programming

Hi all memebrs! I am new to this forum and also new to fortran programming. i am having a fortran program whisch i tried to run with plato. I am getting following error:

Runtime error from program:c:\users\vedant\desktop\trial fortran program\trial\final.exe Run-time Error *** Error 112, Reference to undefined variable, array element or function result (/UNDEF)

MULTIP - in file final.for at line 639 [+044a]

main - in file final.for at line 318 [+3959]

How to resolve this Kindly help.

----Dinesh

This probably means that you have used a variable (on the right hand side of an assignment statement) without first giving it a value.