tbcload -is redirect error using tclapp.exe on Windows 7

I have a bunch of Windows .bat scripts that I use to build tclapps and they have been working fine for a while. I'm positive I did not change any of the build scripts at all but they are no longer working and I get the following error. Note the entire command line is not included below.

Again, this has been working for at least a year now.. This is using TCL Dev Kit 5.2

Thanks

Al Silverstein

tclapp.exe -compile -compilefor 8.5 -interpreter ./my_tkbase.exe -out myprogram.ngl ......

error package 'tbcload -is redirect' is not known (Specified, Not recoverable)
error
error Aborting
error