374af96c_pter_5__OpenGL_Reference_Pages__tant_is_guaranteed_to_be_zero_
[GL_NO_ERROR] GL_INVALID_OPERATION
The specified operation is not allowed in the current state. The offending command is ignored, having no side effect other than to set the error flag.
Chapter 5. OpenGL Reference Pages
No error has been recorded. The value of this symbolic constant is guaranteed to be zero.