# 2028 Setting TDBISAMDatabase KeepTablesOpen to True Can Cause Access Denied Error During ALTER TABLE

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I use a routine since aeons to update table structures. First, I check if the current version of a table is smaller than it should be. If it is, I start a SQL statement.

That means that I access that table via UserMajorVersion/UserMinorVersion to get the version. I use a temporary TDBISAMTable object to do that. It will be freed after I get the version number, and I don't open that table to get the version number.

Now the problem: if I try a ALTER TABLE after getting the version number and freeing the temporary object, I get an error #11013. That only happens when "KeepTablesOpen" of the database is set to true. If it is false, everything runs fine.