Merge pull request #861 from lsst/tickets/DM-41646

DM-41646: Fix logging when all visits rejected in BestSeeingSelectVisitsTask.

python/lsst/pipe/tasks/selectImages.py

@@ -524,8 +524,17 @@ def run(self, visitSummaries, skyMap, dataId):
             output = sortedVisits
         else:
             output = sortedVisits[:self.config.nVisitsMax]
-        self.log.info("%d images selected with FWHM range of %f--%f arcseconds",
-                      len(output), fwhmSizes[visits.index(output[0])], fwhmSizes[visits.index(output[-1])])
+
+        if len(output) == 0:
+            self.log.info("All images rejected in BestSeeingSelectVisitsTask.")
+            raise pipeBase.NoWorkFound(f"No good images found for {dataId}")
+        else:
+            self.log.info(
+                "%d images selected with FWHM range of %f--%f arcseconds",
+                len(output),
+                fwhmSizes[visits.index(output[0])],
+                fwhmSizes[visits.index(output[-1])],
+            )
 
         # In order to store as a StructuredDataDict, convert list to dict
         goodVisits = {key: True for key in output}