grabbing 6 characters from the middle of a variable length string

[Galiphraen]

I need to grab the 6 numbers from the middle of a string like ABCDEF123456A and ABCDEFGH123456A. So I want 6 characters starting at the 7 last character in a string. I tried mid(TEXT, len(TEXT)-7,6) but I get a proceedural error.
mid(TEXT,7,6) has no issues but the starting point varies and the mid() does not seem to like the LEN(TEXT)-7 in the middle.
Is there a better way?

[NeoPa]

Timelord?

Try :

Mid(strData, Len(strData) - 6, 6)

Alternatively, the following will also work :

Left(Right(strData, 7), 6)

[Rabbit]

Please post the full error message.

I suspect you have a string less than 8 characters long and len - 7 is 0 or negative.

[Galiphraen]

Thanks Rabbit, you are right. There are shorter strings. Focussed on the problem at hand and not the whole picture. :-)
Thanks NeoPa. I will try your suggestion.
It looks like I will need to set up some kind of conditional test to deal with different strings as some look like AB123456 and some like ABCDE123456A.

[NeoPa]

The point (one of them at least) I was trying to get across is that you don't want Len() - 7 at all in the scenario you described, but Len() - 6.

If you use either of the code snippets I suggested and the data is formatted as you described it in your first post then it will work perfectly for you.