1 files changed, 6 insertions, 0 deletions
diff --git a/r_qtl/errors.py b/r_qtl/errors.py
index 20c5ced..417eb58 100644
--- a/r_qtl/errors.py
+++ b/r_qtl/errors.py
@@ -5,3 +5,9 @@ class RQTLError(Exception):
 
 class InvalidFormat(RQTLError):
     """Raised when the format of the file(s) is invalid."""
+
+class MissingFileError(InvalidFormat):
+    """
+    Raise when at least one file listed in the control file is missing from the
+    R/qtl2 bundle.
+    """