Unable to open *.pcb and *.sch with ExpressPCB

[sprasv]

Hello,

I have a couple of *.sch files and a *.pcb file which are on a CD which i want to open in ExpressPCB, but when i try to do that it says these arent valid ExpressPCB files. documentation for these files says they re ExpressPCB files.

What could be causing this error? how do i solve this and how do i get to open these files?

Please provide some help.
Thanks,
Prasanna

 

[FvM]

The first step would be to find out which CAD tool these files have been generated from. Apparently, it's not ExpressPCB. The file extensions *.sch and *.pcb are howver shared by a number of CAD tools and aren't very specific.

 

[andre_luis]

Try open those files with a text editor, and verify if at first lines there are a header information.

+++

 

[ckshivaram]

yes as FvM has told... it does not look like an valid express pcb software files.... if we use protel, it might open as i had many files like that and that time i used only express pcb and protel schematic softwares....

try with protel schematic software once..... or try out other experts suggestion...

 

[nandhu015]

You cant open a file which is generated by latest version of express pcb with old version.

Try latest version.