X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/420b31d5f181d320e6f770cc3c63f2ae66908c88..35852356dd9bb2e29e8aebb208e063d9fe924316:/sdk/cwl/arvados_cwl/runner.py

diff --git a/sdk/cwl/arvados_cwl/runner.py b/sdk/cwl/arvados_cwl/runner.py
index 752cc32ba6..68b2fd827a 100644
--- a/sdk/cwl/arvados_cwl/runner.py
+++ b/sdk/cwl/arvados_cwl/runner.py
@@ -137,8 +137,8 @@ def set_secondary(fsaccess, builder, inputschema, secondaryspec, primary, discov
         # set secondaryFiles, may be inherited by compound types.
         secondaryspec = inputschema["secondaryFiles"]
 
-    if isinstance(inputschema["type"], Mapping):
-        # compound type (array or record)
+    if isinstance(inputschema["type"], (Mapping, Sequence)):
+        # compound type (union, array, record)
         set_secondary(fsaccess, builder, inputschema["type"], secondaryspec, primary, discovered)
 
     elif (inputschema["type"] == "record" and