In this blog post, you’ll learn more about the Sybase Error Character substitution occurred when converting from %1 to %2 and the reason for receiving this error
Sybase SQL Error Message
Character substitution occurred when converting from %1 to %2
Reason for this Error
While the server was performing character set conversion on an input string, some characters could not be represented in the database character set. Those characters were substituted. See on_charset_conversion_failure option.