Unable to convert from 'Int' to 'Int()' ?????

Function AddToMyList(Txt$)
	Local CheckCount:Int
	
	MyList.AddLast(Txt$)
	CheckCount = MyList.Count()
	If CheckCount > 37 Then
		MyList.RemoveFirst()
	EndIf
EndFunction

When I run the code above I get the error: "Unable to convert from 'Int' to 'Int()'".

What does this mean and how can I fix it?

Count is a method, not a field.

CheckCount = MyList.Count()

That's just a typo (Note: Typo is fixed in edit). The error still occurs with the "()" there.

try this:

Function AddToMyList(Txt$)	
	MyList.AddLast(Txt$)
	If MyList.Count() > 37 Then
		MyList.RemoveFirst()
	EndIf
EndFunction

That worked, thank you

I don't see why the code as written above wouldn't work. You should be able to assign the result of a method to a variable. So either you have:
A. A bug with BlitzMAX which needs to be hunted down and fixed
B. A problem with your program elsewhere, which still hasn't been fixed and will create weird bugs later on.

In all probability, I'd say it is B. Are you running Superstrict? That will catch a lot of bugs you might otherwise miss.

Of course, there is still the possibility that:
C. I don't really understand methods like I thought I did and you really can't assign the result to a variable.

That first code works for me...

Function AddToMyList(Txt$)
	Local CheckCount:Int
	
	MyList.AddLast(Txt$)
	CheckCount = MyList.Count()
	If CheckCount > 2 Then
		MyList.RemoveFirst()
	EndIf
	Print "Start"
	For Local all:String=EachIn mylist
		Print all
	Next
	Print "end"
EndFunction

Global mylist:TList=CreateList()

For Local num:Int= 0 To 3
	addtomylist(String(num))
Next

The actual error message matches what Gabriel posted so, maybe, Wilkua missed something before editing the original post?