Material compiler incorrectly generates error

Under certain conditions, the material compiler appears to detect errors where there are none. I debugged the particular case of the RGBtoHSV material function with JonathanL, and we believe that this is a bug in the compiler.

In an attempt to track down the issue, I copy/pasted the contents of the RGBtoHSV function directly into the material. This showed that two of the if-nodes supposedly had wrong inputs. Both inputs expect float values, and the inputs are float indeed. However, the material compiler determines that the inputs are not compatible and prints an error. Perhaps the error masks another problem in a different node, and the error message is misleading. I was not able to determine whether this is the case.

1) Create a new material
2) Wire up the RGBtoHSV material function as shown in materialeditor2.jpg

Result: The RGBtoHSV function is shown to have an error

Fix UE-51650

i have this problem UE4CC-Windows-58DC12AF4B97F057BD108FBFF569B2E9_0000

UE-81742 DXGI_ERROR_INVALID_CALL

I am not able to find world outliner how to enable it?

An error occurred while trying to generate project files !?

Delay nodes occasionally don't fire the "Completed" output in a nativized build

Undefined sysmbol: typeinfo for AActor when cross-compile linux dedicated server on windows

[4.18] Visual Studio opens unnecessary windows when adding a new C++ class via the editor's interface

Bullet replication problem. The players sees each other but does not see the bullet

Assertion failed on opening a project