Index: trunk/util/boxsym-rnd/generator.awk
===================================================================
--- trunk/util/boxsym-rnd/generator.awk	(revision 4859)
+++ trunk/util/boxsym-rnd/generator.awk	(revision 4860)
@@ -333,6 +333,10 @@
 function gen_monolith(   ALIGN)
 {
 	ofn=basename ".sym"
+	if (ofn == inputname) {
+		print "Error: can not generate monolith symbol because of file name collision. Rename your input file so it doesn't end in .sym!" > "/dev/stderr"
+		return
+	}
 	ALIGN["cfg", "expand_slot"] = 1
 	align_pins("", ALIGN)
 	sym_begin(refdes, -2*pin_grid, -pin_grid)
Index: trunk/util/boxsym-rnd/parser.awk
===================================================================
--- trunk/util/boxsym-rnd/parser.awk	(revision 4859)
+++ trunk/util/boxsym-rnd/parser.awk	(revision 4860)
@@ -136,7 +136,8 @@
 }
 
 (NR == 1) {
-	basename=FILENAME
+	inputname=FILENAME
+	basename=inputname
 	sub("[.][^.]*$", "", basename)
 }
 /^[\t ]*#/ { next }