Paradox 7 Table Error help needed

[setitup]

I've got a rather annoying problem with a Paradox 7 table.

I've checked the table physically one by one entry - it is not corrupt. It is a standard

table with mostly string vales ex Name Surname Address Note(Memo field) etc. The Delphi written program hangs when just opening a page with Standard DBEdit boxes assigned to these fields.

The problem:
In BDD you can go down and up by using the arrow keys. But when I use the Pg Down or Pg Up key it scrambles the top half of the screen with the last entry almost always No 2729, waits a bit and then clears the BDD table grid and displays one of these two

errors: Table is full or Data other than header.

The table is now 3200 entries big approx 4MB.

Can the table be full?

Has anyone got any ideas?

 

[setitup]

Found the problem - the table was corrupt, or the index - I don't quite understand Paradox indexes. The last few items kept repeating themselves.