EXISTS WITHIN (Decimal-238, string "exists within" string)

["Pierre d'Or jcvanhaeften@xxxxxxxx" jcvanhaeften@xxxxxxxx]

I want to know if a certain string is occuring in an other
string, and thats what this logical operator does.
But how to use it in an IF ?

I tried serveral possebilleties but they didn't work (see below
or see qq.txt with xy)

greatings Carel

the 238-char below is replaced by an !

≪sv01,Jhon doesn't walk fast≫[BC]≪gltest1≫

≪lbtest1≫≪sv02,fast≫≪if≪is02≫!≪is01≫≫
yes1≪gltest2≫≪ei≫no1≪gltest2≫
≪lbtest2≫≪sv02,slow≫≪if≪is02≫!≪is01≫≫
yes2≪gltest3≫≪ei≫no2≪gltest3≫

≪lbtest3≫≪sv02,fast≫≪if(≪is02≫!≪is01≫)==TRUE≫
yes3≪gltest4≫≪ei≫no3≪gltest4≫
≪lbtest4≫≪sv02,slow≫≪if(≪is02≫!≪is01≫)==TRUE≫
yes4≪gltest5≫≪ei≫no4≪gltest5≫

≪lbtest5≫

I got 4 times a yes

®sv01,Jhon doesn't walk fast¯ÿ?®gltest1¯

®lbtest1¯®sv02,fast¯®if®is02¯î®is01¯¯
yes1®gltest2¯®ei¯no1®gltest2¯
®lbtest2¯®sv02,slow¯®if®is02¯î®is01¯¯
yes2®gltest3¯®ei¯no2®gltest3¯

®lbtest3¯®sv02,fast¯®if(®is02¯î®is01¯)==TRUE¯
yes3®gltest4¯®ei¯no3®gltest4¯
®lbtest4¯®sv02,slow¯®if(®is02¯î®is01¯)==TRUE¯
yes4®gltest5¯®ei¯no4®gltest5¯

®lbtest5¯