Passing a pointer in Signal/Slot Connection

[marcel]

maybe you should try dynamic_cast<> and only access the data if the pointer to the casted object is valid. At least, that is the safest way to do a cast.

void DMXTable::SLOT_AllDMXPropsReceived( unsigned long u4member, void* pData )
{
    CDMXGateway* pNode = dynamic_cast<CDMXGateway*>( pData );
    if (pNode) {
            // Access data & crash
           SetDeviceName( pNode->GetDeviceName() );
           SetIPAddr( pNode->GetIPAddr() );
           ...
}

void DMXTable::SLOT_AllDMXPropsReceived( unsigned long u4member, void* pData )
{
    CDMXGateway* pNode = dynamic_cast<CDMXGateway*>( pData );
    if (pNode) {
            // Access data & crash
           SetDeviceName( pNode->GetDeviceName() );
           SetIPAddr( pNode->GetIPAddr() );
           ...
}

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Are you advising him to patch his code?

@mclark: Could we see the code from the thread where you emit the signal?
BTW, you shouldn't use void*, but register your custom type with qRegisterMetaType.
And if you're using visual studio, why in the world won't you debug the application? You can't get a debugger better than that.