fix: incorrect check

Author: mgxd

nipype/interfaces/fsl/preprocess.py

@@ -563,7 +563,7 @@ def _parse_inputs(self, skip=None):
             if not isdefined(self.inputs.verbose) or self.inputs.verbose == 0:
                 self.inputs.verbose = 1
         if isdefined(self.inputs.apply_xfm) and self.inputs.apply_xfm:
-            if not self.inputs.in_matrix_file or not self.inputs.uses_qform:
+            if not self.inputs.in_matrix_file and not self.inputs.uses_qform:
                 raise RuntimeError('Argument apply_xfm requires in_matrix_file '
                                    'or uses_qform arguments to run')
         skip.append('save_log')

nipype/interfaces/fsl/tests/test_auto_ApplyXfm.py

@@ -10,7 +10,6 @@ def test_ApplyXFM_inputs():
     xor=['apply_xfm'],
     ),
     apply_xfm=dict(argstr='-applyxfm',
-    requires=['in_matrix_file'],
     usedefault=True,
     ),
     args=dict(argstr='%s',