problems reading from binary files

Since I have my new computer I have problems running some .pas files. More specifically when handling binary files. In the program there should be read some records into a binary files and writen records to binary files.
I use the functions assign, reset, read, write,etc... (classic functions for handling binary files). When reading from certain files after compiling I get a run time error (2)..
When I run the program on my old computer, everything works fine.
Does anyone recognize this problem? Solutions?
Thnx