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  1. Hi there! I've a problem managing custom keys. I'm not able to check if they exist. If I query a custom key that doens't exist i got an error and it exit the lisp. What's the right command to accomplish that? (setq App (vlax-Get-Acad-Object) Doc (vla-Get-ActiveDocument App) summaryInfo (vla-Get-SummaryInfo Doc) (IF (/ nil (vla-GetCustomByKey summaryInfo "n_project" 'Value)) ... ... ) Currently I'm just looking for the number of elements and if they are less then 3 i create them all.. It's time to fix that (IF (< (vla-NumCustomInfo summaryInfo) 3) (crea_customkeys summaryInfo) ) Thanks for the help! Dennis
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