On VS2015, no DDX_Text invocation statement is generated after using the CPPMFC dialog box to edit and define the variable

1, on VS2015, after using the CPPMFC dialog box to edit and define the variable, the function body DoDataExchange is empty and no DDX_Text call statement is generated.
2. The problem is like a problem. I don"t know what"s going on.

CPP
Mar.10,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1eb0ff7-231d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1eb0ff7-231d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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