add error handling

src/nextflow_file.py

@@ -23,6 +23,9 @@ from .bioflowinsighterror import BioFlowInsightError
 class Nextflow_File(Nextflow_Building_Blocks):
     def __init__(self, address, duplicate = True, DSL="", author = None, name = None, origin=None, output_dir='./results', display_info = True):
         self.file = address 
+        if(self.file.find('/')!=-1):
+            raise BioFlowInsightError(f"BioFlow-Insight cannot directly analyse a workflow from its directory. Please analyse the workflow from the parent directory instead.", num = -1)
+        
         self.output_dir = Path(output_dir)
         contents = ''
         try: