* * *

Author Topic: Unknown Run-Time error : 087.  (Read 1027 times)


  • New member
  • *
  • Posts: 5
Unknown Run-Time error : 087.
« on: January 12, 2018, 08:47:08 pm »

during run-time of a program written with Lazarus v1.4.4 under Win XP SP3 I get a
Unknown Run-Time error : 087.

Where can I find a explanation for it?




  • Hero Member
  • *****
  • Posts: 5337
Good judgement is the result of experience … Experience is the result of bad judgement.

OS : Windows 7 64 bit
Laz: Lazarus 1.4.4 FPC 2.6.4 i386-win32-win32/win64


  • Hero Member
  • *****
  • Posts: 835
Re: Unknown Run-Time error : 087.
« Reply #2 on: January 12, 2018, 11:39:16 pm »
That's a "Invalid Parameter". which means something made its way to the windows API with a
invalid parameter in a function call.

 It could be a lot of things, like garbage values getting passed to a function in laz or what ever
that is simply passing it on to the API..

 You need to run it under debug so you can get a break point on and check the stack to see
who called it.



Get Lazarus at SourceForge.net. Fast, secure and Free Open Source software downloads Open Hub project report for Lazarus