when $COLOR environment in postscript.cfg is empty,
uniprint Driver print the message:

No filename for parameters given. Assume .
Unable to open command line file .upp


To fix bug, apply the patch:

--- ps-to-printer.fpi.orig      Mon Jul 19 16:43:29 1999
+++ ps-to-printer.fpi   Mon Jul 19 16:45:49 1999
@@ -67,7 +67,7 @@
 elif [ "$GSDEVICE" = "uniprint" ]; then
 #  Set default *.upp driver (your default printer upp
driver here)
    if [ "$COLOR" = "" ]; then
-      $COLOR="stcany"
+      COLOR="stcany"
       echo "No filename for parameters given.  Assume
$COLOR."
    fi
 #