Problem with vb.net code on PDA

I have a program that seems to run ok on one PDA but not another. When I attempt to run the program I get the following error message;

"A native exception has occured in BMS_PdaApplication.exe. Select Quit and then restart this program, or select Details for more information."

Looking at the error Details I see

ExceptionCode: 0xc0000005
ExceptionAddress: 0x7828da20
Reading: 0x7828da20

Can anyone help me understand what is happening and where I can start to look to fix this.

Thanks in advance

regards

David
orbitcomsAsked:
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alexey_gusevCommented:
you're having Access Violation exception, ie something is equal to Nothing or DBNull.Value in your code

install System_SR_ENU.CAB to get  more info (available eg from C:\Program Files\Microsoft.NET\SDK\CompactFramework\v2.0\WindowsCE\Diagnostics - depends on where's the installation of cf,net assemblies)
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orbitcomsAuthor Commented:
Hired local tech to resolve
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