1 files changed, 10 insertions, 0 deletions
diff --git a/lib/cli.py b/lib/cli.py
index 0ebe42d..5c6544c 100644
--- a/lib/cli.py
+++ b/lib/cli.py
@@ -4,10 +4,20 @@ import dfatool.functions as df
 import dfatool.plotter
 import logging
 import numpy as np
+import os
+import sys
 
 logger = logging.getLogger(__name__)
 
 
+def sanity_check(args):
+    if args.force_tree and bool(int(os.getenv("DFATOOL_FIT_FOL", "0"))):
+        print(
+            "--force-tree and DFATOOL_FIT_FOL=1 are mutually exclusive", file=sys.stderr
+        )
+        sys.exit(1)
+
+
 def print_static(model, static_model, name, attribute, with_dependence=False):
     unit = "  "
     if attribute == "power":