Hi Michael,
> Your code:
> 
> local groep="lft"+string((`y'-1)*5)+"_"+string(`y'*5)+`gesl';
> 
> will not work since +`gesl' at the end is expanded to +_m, 
> and Stata doesn't 
> know what _m is.  Try
> 
> local groep="lft"+string((`y'-1)*5)+"_"+string(`y'*5)+"`gesl'";
> local sterfte="stf"+"`gesl'";
> 
> although this last line can be just
> 
> local sterfte="stf`gesl'";
Ah, ok, thanks a lot! It seems to be a rather trivial thing after all...
Best,
-Hendri.
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