CK71 suddenly hang when taking a picture using the camera

Question

Hi team, The customer is using the CK71 with camera option.
OS is. 1.61.22.72.
Our partner developed the camera application based on Intermec source file according to the IDL(Multimedia Resource Kit).
Regarding the source that the partner tested, I attached the zip file including the DotNetCF 3.5.
Also, I attached the CNxDShow.CAB that we have to install first for operating the camera. The symptom is... when taking the picture again and again in light environment and in dark environment by turns, suddenly CN70 hang. For restoring, we should remove the battery and install it again for rebooting.
But, the customer hates the removing and reinstalling the battery. To reproduce the symptom....
1. Copy all file under the folder "\FullSreenCameraCNx\FullSreenCameraCNx\bin\Debug" and paste them into the device.
2. Copy the CNxDShow.CAB and paste into the device.
3. Install the CNxDShow.CAB first
4. Create new folder "\My Documents\My Pictures" on the device, if the device doesn't have the name of the folder
5. Execute the FullScreenCameraCNx.exe on the device by clicking
6. Try taking a picture by pushing the enter key in light/dark environment by turns again and againIn our trouble shooting,
The application put the log file when taking a picture.
the location of the log is under the folder "Flash File Store\Log\Device_Conncet".
Normal log is...
===================================
2015-06-30 5:2:31 Camera Shot S
2015-06-30 5:2:31 Camera Shot E
2015-06-30 5:2:33 Start
2015-06-30 5:2:33 Shot Result : Ok : \My Documents\My Pictures\SnapShot-5.jpg
===================================or
===================================
2015-06-30 4:58:0 Camera Shot S
2015-06-30 4:58:0 Camera Shot E
2015-06-30 4:58:1 Start
2015-06-30 4:58:1 Snapshot failed
===================================But, Abnormal log when Device hang suddenly is ...
No "Start" or No "Snapshot failed" like the below.
===================================
2015-06-30 5:5:34 Camera Shot S
2015-06-30 5:5:34 Camera Shot E
2015-06-30 5:5:34 Camera Shot S
2015-06-30 5:5:34 Camera Shot E
2015-06-30 5:5:34 Camera Shot S
2015-06-30 5:5:34 Camera Shot E
2015-06-30 5:5:35 Camera Shot S
2015-06-30 5:5:35 Camera Shot E
===================================Please see the logfile in the 20150630.txt that I attached additionally.
The thing that we are feeling that it was strange is....
in the source, if invoked "Cam.Snapshot(CurrentResolution)", "Cam_SnapshotEvent" should be called. But, when we experienced the "Device Hang" during taking the pictures, I guess that "Cam_SnapshotEvent" were not called. I copied and pasted the some part of source that I want to highlight like the below.
============================================================//---------------------------------------------------
// make snapshot
bool AcceptingEnter = true; //for eliminating repeating enter keydown events...
void Form1_KeyDown(object sender, KeyEventArgs e)
if (e.KeyData == Keys.Enter && AcceptingEnter == true)
AcceptingEnter = false;
log_Entity.write_Log(1, " Camera Shot S");
Cam.Snapshot(CurrentResolution);
log_Entity.write_Log(1, " Camera Shot E");
e.Handled = true;
// Received snapshot event
void Cam_SnapshotEvent(object sender, Camera.SnapshotArgs sna)
log_Entity.write_Log(1, " Start");
if (sna.Status != Camera.SnapshotStatus.Ok)
log_Entity.write_Log(1, " Snapshot failed");
MessageBox.Show("Snapshot failed");
else
log_Entity.write_Log(1, " Shot Result : " + sna.Status + " : " + sna.Filename);
============================================================ Can anyone provide the information or solution why the CK71 suddenly hang and how to avoid the "device hang"? Best Regards,
Kim, Hyun Wook  

Answer 1

Hello
you opened a case at our support portal. That is the right way to get support for such very specific issues.
Thanks
Josef