Update: workflow

tasks/TNscope.wdl

   String SENTIEON_LICENSE
   File tumor_recaled_bam
   File tumor_recaled_bam_index
-  File normal_recaled_bam
-  File normal_recaled_bam_index
+  File? normal_recaled_bam
+  File? normal_recaled_bam_index
   String tumor_name
   String normal_name
 

workflow.wdl

       }
     }
 
-    if (varscan) {
+    if (varscan & normal_deduped_bam != "") {
       call somatic.somatic as somatic_fb {
         input:
         sample=sample_id,