[sane-devel] Ep_to_piperef error

[Brandon Carpenter]

Thanks Mattias for the information about the error and
the link to the AppleDev page.
I could now use some direction about what needs to be
done to get things fixed. I have checked the scanner
to make sure it works, checked the USB cable. I have
uninstalled and reinstalled both the SANE, Twain
interface, and the needed libraries. I have
Uninstalled  the Epson Scanner Utilities and
reinstalled. I have tried both applications installed.
I still get the same errors. 
I am at a loss also, as to why for weeks there were no
issues. Nothing had change on the system. The system
is in a controlled enviroment.
Thanks again for your help.
Brandon 

Here is a snippet of the log:

scanimage: reading one scanline, 7656 bytes... 
[sanei_usb] sanei_usb_write_bulk: trying to write 10
bytes
usb_bulk_write: ep addr = 0x02
Converting ep address to pipeRef.
ep_to_pipeRef: an error occurred getting pipe
information on pipe 1
USB error: ep_to_pipeRef(GetPipeProperties): no
connection to an IOService
USB error: usb_bulk_write: invalid pipe reference
[sanei_usb] sanei_usb_write_bulk: write failed: No
such file or directory
Converting ep address to pipeRef.
ep_to_pipeRef: interface is 305490
USB error: ep_to_pipeRef: can't get number of
endpoints for interface
USB error: usb_clear_halt(ClearPipeStall): no
connection to an IOService
FAIL No data


--- Mattias Ellert <mattias.ellert@tsl.uu.se> wrote:
> Brandon Carpenter wrote:
> 
> >>scanimage > /scanIn/test.tif
> > 
> > Ep_to_piperef: Error occured getting pipe
> information
> > on pipe 1
> > 
> > Does anyone have an idea what this means?
> > 
> > Brandon Carpenter
> 
> This error is from libusb.
> 
>      ret =
>
(*(device->interface))->GetPipeProperties(device->interface,
> 
> i, &direction, &number,
> 						    &dont_care1, &dont_care2, &dont_care3);
> 
>      if (ret != kIOReturnSuccess) {
>        fprintf (stderr, "ep_to_pipeRef: an error
> occurred getting pipe 
> information on pipe %d\n",
> 	       i );
>        USB_ERROR_STR(-darwin_to_errno(ret), 
> "ep_to_pipeRef(GetPipeProperties): %s",
> darwin_error_str(ret));
>      }
> 
> The documentation says the following about
> GetPipeProperties:
> 
>
http://developer.apple.com/documentation/Darwin/Reference/IOKit/IOUSBLib/Classes/IOUSBInterfaceInterface197/Functions/Functions.html#GetPipeProperties
> 
> function result
>   Returns kIOReturnSuccess if successful,
>           kIOReturnNoDevice if there is no
> connection to an IOService, or
>           kIOReturnNotOpen if the interface is not
> open for exclusive 
> access.
> 
> If you set SANE_DEBUG_SANEI_USB to 5 or greater when
> running scanimage 
> you should get an additional error message saying
> either of the following:
> 
> ep_to_pipeRef(GetPipeProperties): no connection to
> an IOService
> ep_to_pipeRef(GetPipeProperties): device not opened
> for exclusive access
> 
> 	Mattias
> 
> 
> -- 
>
________________________________________________________________________
> 
> mattias.ellert@tsl.uu.se                          
> tel: +46 18 471 32 58
> http://www.tsl.uu.se/~ellert/                     
> fax: +46 18 471 35 13
>
________________________________________________________________________
> 



	
		
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