modified judgment condition

workflow.wdl

@@ -257,7 +257,7 @@ workflow {{ project_name }} {
 		}
 	}
 
-	if (set_annovar){
+	if (set_annovar && defined(TNscope.TNscope_vcf) && defined(TNseq.TNseq_vcf)){
 		call annovar.annovar as annovar {
 			input:
 			docker=annovar_docker,