Hello,
it seems that the font does not contain the requested character codes that are necessary to display the desired string.
The error messate with code 180 contains additional information: info2 represents the characted code that causes the error.
Please check your font and make sure that it includes the cyrillic character set.
Does your application work when you choose another font - e.g. Segoe UI? You can also try the string table example and add your language for further tests.
Best regards,
Manfred.