Author Topic: Usb Problem  (Read 1469 times)


  • Newbie
  • *
  • Posts: 1
    • View Profile
Usb Problem
« on: March 04, 2010, 03:33:27 pm »
Hello Roman,

I have installed nrCommLib and I have used TnrBT component for Bluetooth dialog with a Nxt Mindstorm Lego robot. All is Ok.
But when i want use the TnrUSB component like in your example UsbDeviceDemoBcb, the line nrUSB1 -> UpdateDescriptors()
crashes with the message: "Access violation at addresse 0044C510 in module NRCOMM5.BPL". The Update method works correctly but it is impossible to acces at nrUSB1 -> UsbDevice -> Description.
Have you an idea for correcting this problem.
Thank you for your attention.
Alain Franche

Roman Novgorodov

  • Engineer
  • Administrator
  • Hero Member
  • *****
  • Posts: 1008
  • we will win
    • View Profile
    • Forums.nrCommLib.Com
Re: Usb Problem
« Reply #1 on: March 30, 2010, 03:47:17 pm »

I'm sorry for so later reply.
It seems like we have problems with email notifications about new messages in forum boards.

Thank you for information.
We can't repeat problem, but we modified UpdateDescriptors() method and now it is some stable (since v9.06).

Roman Novgorodov

DeepSoftware llc - The professional components for Delphi/CBuilder/.NET. The high quality custom software development.
Forums.nrCommLib.Com - DeepSoftware Tech Support Forum.