fix a bug with error retreiving

src/jflow/workflow.py

@@ -536,8 +536,11 @@ class Workflow(threading.Thread):
                 error["title"]     = lines[line_idx].rstrip()
                 error["msg"]       = list()
                 error["traceback"] = list()
-                line_idx += 2 # skip : "Traceback (most recent call last):"
-                # Traceback
+                # skip all lines before the traceback
+                while not lines[line_idx].startswith("Traceback"):
+                    line_idx += 1
+                # skip : "Traceback (most recent call last):"
+                line_idx += 1    
                 while lines[line_idx] != lines[line_idx].lstrip():
                     error["traceback"].append({ 
                                                "location" : lines[line_idx].strip(),
@@ -546,7 +549,10 @@ class Workflow(threading.Thread):
                     line_idx += 2
                 # Error message
                 while line_idx < len(lines) and not lines[line_idx].strip().startswith("##"):
-                    error["msg"].append( lines[line_idx].strip().split(":", 1)[1][1:] )
+                    try:
+                        error["msg"].append( lines[line_idx].strip().split(":", 1)[1][1:] )
+                    except:
+                        error["msg"].append( lines[line_idx].strip() )
                     line_idx += 1
                 line_idx -= 1
             line_idx += 1