Could not launch the xxx application because the xxx application is currently in launch.

If you get this error in Tizen Studio

Could not launch the xxx application because the xxx application is currently in launch.

The solution is simple. Just close and relaunch Tizen Studio.

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‘main’: input parameter ‘input’ missing semantics

If you’ve received the error message “input parameter ‘xxxx’ missing semantics” in a shader the cause of the error is a missing piece of information on one of your parameters or structures. Here is an example of a shader that will produce that error.

struct VSIn {
	float3 position;
	float4 color;
};

struct PS_IN
{
	float3 position:SV_POSITION;
	float4 color:COLOR;
};

PS_IN main(VSIn input)
{
	PS_IN output;
	output.position = input.position;
	output.color = input.color;
	return output;
}

Here the correction would be to add the semantics POSITION and COLOR to the shader. The corrected shader looks like the following.

struct VSIn {
	float3 position:POSITION;
	float4 color:COLOR;
};

struct PS_IN
{
	float3 position:SV_POSITION;
	float4 color:COLOR;
};

PS_IN main(VSIn input)
{
	PS_IN output;
	output.position = input.position;
	output.color = input.color;
	return output;
}