We noticed that you had sent the same question to email support as well, so the case was assigned to the component’s developer. An answer was sent to your email support request, but here it is again to benefit others:
You can call ValidationProvider.Valide to re-evaluate the validation of a form or specific component. To force an error message to go blank even if the error is still valid, you can call SetValidationError to set it to whatever you want, including an empty string.
Imported from legacy forums. Posted by Diane [Xceed] (had 1018 views)