Calling play() or set_parameter() on an Event that contains an Event instrument with a parameter throws an error

[nstgeorge]

As an example of this issue, I have a footstep event that contains a water_footstep Event instrument with a parameter for WaterDepth. This parameter shows up as expected in the Godot editor, but each time I call play() or set_parameter() on the event emitter, I have the following error message:

E 0:00:03:289   player_controller.gd:242 @ make_footstep_sound(): Cannot set parameter  to value 0.000000void __cdecl godot::FmodEvent::set_parameter_by_name(const class godot::String &,float) constsrc\studio\fmod_event.cpp69
  <C++ Source>  core/variant/variant_utility.cpp:1024 @ push_error()
  <Stack Trace> player_controller.gd:242 @ make_footstep_sound()
                player_controller.gd:168 @ _handle_ground_physics()
                player_controller.gd:291 @ _physics_process()

This happens even if the set_parameter() call is not on the referenced parameter.

When this error appears, the audio still plays, but the referenced parameter does not get updated if I try to update it. Sometimes the game will crash when the event is triggered, but when this happens, there is no error message.

I'm not 100% certain that this is caused by the referenced parameter, but it does seem likely given that there is another "normal" parameter on this Event, and if I remove the Event instrument, things work normally. It seems like the reference isn't resolved correctly since the parameter name that would be in the error message is missing.

[4ndiDev]

Oh. This is similar to what I'm seeing here. I'm down in a rabbit hole of UTF8 encoding issues, as I can see some more errors after using a godot build with symbols.

ERROR: Unicode parsing error: Invalid unicode codepoint (756f7247)
ERROR: Unicode parsing error, some characters were replaced with � (U+FFFD): Invalid unicode codepoint (88000b00), cannot represent as UTF-8

But also as you the Cannot set "empty " paramater error and sometimes very randomly a crash. It prevents me right now from releasing a demo.

After reading about your other bug, I will remove and re-add the emitters and also consider moving to using IDs instead of parameter names.

[nstgeorge]

@4ndiDev yeah, I see this unicode behavior now too. Some of my event names have underscores - maybe that's why? It seems like the plugin might be trying to evaluate some other memory location as Unicode, since I don't know what encoding would use such high values (but I don't know much about that).

I see a pretty wide variety of values.

ERROR: Unicode parsing error, some characters were replaced with � (U+FFFD): Invalid unicode codepoint (90022960), cannot represent as UTF-8
  ERROR: Unicode parsing error, some characters were replaced with � (U+FFFD): Invalid unicode codepoint (9d4d3330), cannot represent as UTF-8
  ERROR: Unicode parsing error, some characters were replaced with � (U+FFFD): Invalid unicode codepoint (9d6ac200), cannot represent as UTF-8
  ERROR: Unicode parsing error, some characters were replaced with � (U+FFFD): Invalid unicode codepoint (9d498130), cannot represent as UTF-8
  ERROR: Unicode parsing error, some characters were replaced with � (U+FFFD): Invalid unicode codepoint (9d4983f0), cannot represent as UTF-8

I also see this strange message in the debugger:

E 0:00:01:853   player_controller.gd:244 @ make_footstep_sound(): Cannot set parameter �ʦ�
  <C++ Source>  core/variant/variant_utility.cpp:1024 @ push_error()

This is for a parameter named "Terrain".

[4ndiDev]

I bypassed the issue now by only using the IDs instead of names.

But a small warning for that because it pushed me into another unrelated rabbit hole:
Fmod Ids use the full length of int. The inspector in Godot under the hood transforms the int to a float, which adds .0 but as we are at full length it alters the last digit of the int.
I had to make a map with name-ID in code to change parameters. In my case I have characters with a state that start and stop music instruments. So the character has just a name as identifier and tells my audio manager its state and the audiomanager maps that name to the parameter ID.
Since I made that change the Unicode errors (and crashes is release) are gone.