the PCB files Contain extension of *.TRC, *.LLB, *.OUT, *.LPL, *.LVS ....
the designer say it is circuit maker file. but the circuit maker 2000 could not open
the same. any old circuit maker program which use the above extension
Ashok:
.trc files are trace logs .llb are labview application program libraries
.out are line or output files
having a look at these extensions I have a hinch that they point toward labview ECAD programs. You need to find some old labview program and hopfully the PCB files will open in it.