--- a/eric6/DocumentationTools/IndexGenerator.py	Sat Nov 21 19:31:16 2020 +0100
+++ b/eric6/DocumentationTools/IndexGenerator.py	Sun Nov 22 16:04:59 2020 +0100
@@ -207,7 +207,7 @@
                 if basename:
                     package = package.replace(basename, "")
                 out = self.__writeIndex(package, element, newline)
-            except IOError as v:
+            except OSError as v:
                 sys.stderr.write("{0} error: {1}\n".format(package, v[1]))
             else:
                 if out: