Yes. And If I remove the refernce of this sys file from inf, I get such errors : Driver package references a missing external file 'C:\Windows\system32\drivers\vaddyn.sys'. Error = 0x00000002 Installing NULL driver! ! dvi: A NULL driver installation is not allowed for this type of device! !!! dvi: Cleaning up failed installation (e0000219) !!! dvi: Default installer: failed! !!! dvi: Error 0xe0000219: The installation failed because a function driver was not specified for this device instance. However this file is not generated as a part of this package. On Tue, Mar 6, 2012 at 4:50 PM, Matthew van Eerde < Matthew.van.Eerde@xxxxxxxxxxxxx> wrote: > All files that are referenced anywhere in the .inf need to be present > for the driver to install, even if they are not used for the given device. > **** > > ** ** > > *From:* wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto: > wdmaudiodev-bounce@xxxxxxxxxxxxx] *On Behalf Of *Tim Roberts > *Sent:* Tuesday, March 6, 2012 4:42 PM > *To:* wdmaudiodev@xxxxxxxxxxxxx > *Subject:* [wdmaudiodev] Re: MSVAD sample and Audio engine traces**** > > ** ** > > Rashee Chadha wrote: **** > > **** > > I have just started working on WDM audio drivers. I am referring to the > MSVAD sample driver which comes with the DDK.**** > > **** > > I used the devcon utility to install this driver (on a Win7 VMWare Virtual > Machine):**** > > **** > > *devcon install msvad.inf *MSVADSimple***** > > **** > > *Initially I got the error of missing cat file. On commenting out this > dependancy from inf file, I get yet another error of missing vaddyn.sys > file.***** > > *This sys file was not generated when I built the entire MSVAD solution.** > *** > > > Did you change the INF? The INF in the sample maps the *MSVADSimple > device identifier to vadsimpl.sys. It does not have the name "vaddyn.sys" > anywhere. If you changed that name in the INF, then you have to change the > name of the binary that you build. > > > > **** > > *Additionally I would like to capture > traces for audioeng.dll,audiokse.dll and portcl.sys. This would help me in > understanding the call flow from the audio engine upto the sample miniport. > ***** > > *Which setting I need to do in order to achieve this.***** > > > I'm not convinced that such traces are available. > > **** > > -- **** > > Tim Roberts, timr@xxxxxxxxx**** > > Providenza & Boekelheide, Inc.**** > >