I got a Error when I user SimpleIPCServer Component .. lazarus / 9-Editor ---------------------------------------------------------------------- tigerA15 · 2017-05-18 03:43 put a TSimpleIPCServer on Form1, and double click OnMessage property to generate event code . bug i got a Error : ---------------------------------------------------------------------- Darius · 2017-05-20 16:18 In Lazarus IDE v1.6.2 works ok. Bug in Lazarus IDE v1.6.4. ---------------------------------------------------------------------- Thaddy · 2017-05-20 17:01 This is a bug and also present in Lazarus 1.9 (trunk) from today. Please file a bug report.