Rewrite of the content and multi-byte character

Hello,

 

I'm verifying BIG-IP APM v11.5.1 now.

 

I want to rewrite contents of portal access resource using iRule.

 

However, If there are multi-byte character within the resource (in the REWRITE::payload), rewriting fails, and error is outputted.

 

Q.Is there a way to rewrite the content goes well even as multi-byte character is included in the REWRITE::payload?

 

Best regards,

 

Kenta