trying to fiss faulty ev numbering

Author: TheChymera

nipype/interfaces/fsl/model.py

@@ -173,7 +173,12 @@ def _create_ev_files(
         for field in ['cond', 'regress']:
             for i, cond in enumerate(runinfo[field]):
                 name = cond['name']
-                evname.append(name)
+                try:
+                    ev_parameters['temporalderiv'] = ev_parameters.pop('derivs')
+                except KeyError:
+                    evname.append(name)
+                else:
+                    evname.append(name + 'TD')
                 evfname = os.path.join(cwd, 'ev_%s_%d_%d.txt' % (name, runidx,
                                                                  len(evname)))
                 evinfo = []
@@ -197,13 +202,6 @@ def _create_ev_files(
                     ev_parameters['ev_name'] = name
                     ev_parameters['tempfilt_yn'] = do_tempfilter
                     ev_parameters['cond_file'] = evfname
-                    try:
-                        ev_parameters['temporalderiv'] = ev_parameters.pop('derivs')
-                    except KeyError:
-                        pass
-                    else:
-                        evname.append(name + 'TD')
-                        num_evs[1] += 1
                     ev_txt += ev_template.substitute(ev_parameters)
                 elif field == 'regress':
                     evinfo = [[j] for j in cond['val']]