You might want to add an initialization of @save as well, to avoid trying to der eference an undefined value when you leave a toplevel table. Something like this perhaps:
Actually since @save is only being accesed on an end tag
that means a begin tag was involved which pushed a value on save. In case of the first table the values 0,0 will pushed on the save and then poped when that table ends. So I dont think I need to wory about dereferncing an undefined value.
I dont think pushing $tablenr will fix the problem, because when the old value is poped it will think on the next table it should $tablenr++ which will ovewrite the previous data. Have to do something else.
