Added error filter in DSL1 converter -> catches a strange thing

src/process.py

@@ -462,6 +462,8 @@ class Process(Nextflow_Building_Blocks):
         #code = process_2_DSL2(code) 
         lines = []
         for line in code.split("\n"):
+            if(" def " in " "+line):
+                raise BioFlowInsightError(f"[DSL1 converter error] Do not recognise the input '{line.strip()}' in the process '{self.get_name()}'. Try rewritting it in a different way.")
             temp = process_2_DSL2(line.split(" from ")[0]) 
             lines.append(temp)
             #TODO -> need to determine if it's on it's own is it either a path or val