I get a error pop-up before loadingNot reproducible here. (And that's a strange message, since TCMD doesn't load scintilla. It does load scilexer.dll, but I don't see any problems loading that here.)
What version of TCMD are you running (32-bit or 64-bit)?
What version of Windows?
What is the *exact* message you're seeing?
Did you have an (older) copy of TCMD when you installed 14.0.24?
SciLexer.dll was not thereDo you have SciLexer.dll in your installation directory?
I've tried this on three systems and cannot reproduce it -- anybody else seeing this?