ClosedBit error docs

CB_ERR_RUNTIME_LAUNCH

Runtime launch failed. The .cba or .exe package could not start the selected runtime service.

Why it happens

The .cba or .exe package could not start the selected runtime service.

How to fix it

Rebuild from Studio, make sure required runtime DLLs are bundled, and check the first error line for the missing function or invalid value.

Copy-paste fix pattern
compile exe small fps graphics threaded
If the IDE reports a line number, fix that line first, then scan the previous line for an unclosed string, bracket, or block.