Dear Richard,

...

...

...

...

On Mon, 06 Jun 2011 08:24:16 +0200, "Richard B. Kreckel" < kreckel@ginac.de> said: RK> and to the tutorial. Either way, can you recommend a patch?

I am attaching the patch, which admits only varidx as valid parameters. I Hope I did everything right. Best wishes, Vladimir -- Vladimir V. Kisil email: kisilv@maths.leeds.ac.uk -- www: http://www.maths.leeds.ac.uk/~kisilv/