Thank you for your response.
Because of the e-mail problem, I re-entered, but the previous question has been erased. So include below.
The following screen shows the progress of importing process and error message.
As you can see from the error message, it is judged that an error occurred while encoding Hex value.
I will send you more information if you need more.
--------------- previous question ---------------
Hello, all The following error occurred while importing category from php3.1.x forum. creating categories /usr/local/lib/ruby/2.3.0/json/common.rb:224:in `encode': "\xEA" from ASCII-8BIT to UTF-8(Encoding::UndefinedConversionError) I've tried a number of things, but the same result.