Reason of change: Avoid confusion and point to the cause! API change: glIsVBOArrayEnabled() -> glIsVBOArrayBound() glIsVBOElementArrayEnabled() -> glIsVBOElementArrayBound() glIsPBOPackEnabled() -> glIsPBOPackBound() glIsPBOUnpackEnabled() -> glIsPBOUnpackBound() Exception message change: "must be enabled to call this method" -> "must be bound to call this method" "must be disabled to call this method" -> "must be unbound to call this method"
fixed as described ..