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[sabinmaniac]

Hello,

After some experience with NVIDIA opencl version I have decided to try AMD's version of the standard. After I have installed the latest driver ( Catalyst version 12.6 for ATI Radeon HD 3400 Series) and the SDK ( 2.8 ) , I tried to test if the samples are working. To my surprise the simplest one, HelloWorld.exe fails with an access violation exception.

'HelloWorld.exe': Loaded 'C:\Users\Vlad\Documents\AMD APP\samples\opencl\bin\debug\x86\HelloWorld.exe', Symbols loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\ntdll.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\kernel32.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\KernelBase.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Program Files (x86)\AMD APP\bin\x86\OpenCL.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\advapi32.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\msvcrt.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\sechost.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\rpcrt4.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\sspicli.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\cryptbase.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\msvcp100d.dll', Symbols loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\msvcr100d.dll', Symbols loaded.
'HelloWorld.exe': Loaded 'C:\Program Files (x86)\AMD APP\bin\x86\amdocl.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\opengl32.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\gdi32.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\user32.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\lpk.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\usp10.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\glu32.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\ddraw.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\dciman32.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\setupapi.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\cfgmgr32.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\oleaut32.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\ole32.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\devobj.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\dwmapi.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\dbghelp.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\imm32.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\msctf.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\wintrust.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\crypt32.dll', Exports loaded.
'HelloWorld.exe': Loaded 'C:\Windows\SysWOW64\msasn1.dll', Exports loaded.
First-chance exception at 0x00000000 in HelloWorld.exe: 0xC0000005: Access violation.
Unhandled exception at 0x00000000 in HelloWorld.exe: 0xC0000005: Access violation.

This error happens at  clGetPlatformIDs function call.

/*Step1: Getting platforms and choose an available one.*/
    cl_uint numPlatforms = NULL;//the NO. of platforms
    cl_platform_id platform = NULL;//the chosen platform
     cl_int    status = clGetPlatformIDs(0, &platform, &numPlatforms);<---here

Any hint on how to fix this will be highly appreciated.

[nou]

If is first argument 0 then second should be also NULL.

[realhet · Accepted solution]

Note that (As I know) OpenCL will not work below HD4xxx. It needs RV7xx chip at least.

[scharupa]

It's better to use HD5xxx or above. Please see the System Requirements  page for more info

http://developer.amd.com/tools/heterogeneous-computing/amd-accelerated-parallel-processing-app-sdk/s...

Also , Catalyst 12.10 is the compatible driver for SDK 2.8. Please upgrade your cat driver.