--- loncom/homework/CAPA-converter/capaLexerDef.flex	2001/11/21 19:15:41	1.12
+++ loncom/homework/CAPA-converter/capaLexerDef.flex	2001/11/29 18:43:55	1.13
@@ -937,6 +937,7 @@ EndLine    ([\r][\n]|[\n])
 			 BEGIN S_ECHO;
                       }
                     }
+[%]                 {send("%%");}
 {Operator}          { LLDBUG_PR2("[Op(%c) in VAR,TF_STMT,LET]",yytext[0]); send(yytext); }
 }
 
@@ -995,6 +996,9 @@ EndLine    ([\r][\n]|[\n])
                       send("'");
 		      yy_pop_state();
 		    }
+[%]                 { /*Escape percent signs so that vasprintf doesn't choke */
+                      send("%%");
+                    }
 {EndLine}           { /* check for termination of string constant */
                       char warn_msg[WARN_MSG_LENGTH];