vxrefbas: abort if program is variable-protected.

1 files changed, 3 insertions, 0 deletions

diff --git a/vxrefbas.c b/vxrefbas.c
index 5ae6694..c08cb7f 100644
--- a/vxrefbas.c
+++ b/vxrefbas.c
@@ -127,6 +127,9 @@ int main(int argc, char **argv) {
 	readfile();
 	parse_header();
 
+	if(!vntable_ok())
+		die("Program is variable-protected; unprotect it first.");
+
 	on_var_token = handle_var;
 	on_start_line = new_line;
 	on_end_line = end_line;