catch attribute error on executable

Author: tclose

nipype2pydra/task.py

@@ -705,7 +705,10 @@ def types_to_names(spec_fields):
             task_base = "FunctionTask"
             base_imports.append("from pydra.engine.task import FunctionTask")
 
-        executable = self.nipype_interface._cmd
+        try:
+            executable = self.nipype_interface._cmd
+        except AttributeError:
+            executable = None
         if not executable:
             executable = self.nipype_interface.cmd
             if not isinstance(executable, str):