Therion version 6.3.1+dev running on Fedora 41. I came across something interesting today. I was working on a map when this application error occurred. I had to use the "kill" command at a command line to make xTherion close out. I restarted xTherion. Loaded the .th2 file I was working on. Added a user-defined point. Clicked the arrow icon, then the icon to insert a line. At that point this error appears. ============================ can't read "xth(me,cmds,83,31,x)": no such element in array can't read "xth(me,cmds,83,31,x)": no such element in array while executing "set ox $xth(me,cmds,$id,$pid,x)" (procedure "xth_me_cmds_update_line" line 12) invoked from within "xth_me_cmds_update_line $id $pid $xth(ctrl,me,line,type) $xth(ctrl,me,line,name) $xth(ctrl,me,line,opts) $xth(ctrl,me,line,reverse) $xth(ctrl,me,lin..." (procedure "xth_me_cmds_update" line 28) invoked from within "xth_me_cmds_update {}" (procedure "xth_me_cmds_select_linept" line 4) invoked from within "xth_me_cmds_select_linept $id $pid" (procedure "xth_me_cmds_select" line 63) invoked from within "xth_me_cmds_select $id" (procedure "xth_me_cmds_create_line" line 205) invoked from within "xth_me_cmds_create_line {} 1 "" "" """ invoked from within ".xth.tb.edif.lnrb invoke" ("uplevel" body line 1) invoked from within "uplevel #0 [list $w $cmd]" (procedure "tk::CheckRadioInvoke" line 3) invoked from within "tk::CheckRadioInvoke .xth.tb.edif.lnrb" (command bound to event) ======================= After this - no matter what I do - The same error appears. I cannot save or close the file, I cannot open a different file, I cannot compile from within xTherion. The only exit is "kill ..." from a command prompt. The map compiles without error from the command line, so I doubt there is anything wrong with the .th2 file. What did I do???? -- =============== Bill Gee