Worksheet_Change errors

Please HELP!!
There is the code:

Please Login or Register  to view this content.

there is a code, that shows a problem - messages are showed a lot of times...
Cant understand why?
Please help... Urgent!!!
Thank you in advance

Your post does not comply with Rule 3 of our Forum RULES. Use code tags around code. Posting code without them makes your code hard to read and difficult to be copied for testing. Highlight your code and click the # at the top of your post window. For more information about these and other tags, found here

Your post does not comply with Rule 1 of our Forum RULES. Your post title should accurately and concisely describe your problem, not your anticipated solution. Use terms appropriate to a Google search. Poor thread titles, like Please Help, Urgent, Need Help, Formula Problem, Code Problem, and Need Advice will be addressed according to the OP's experience in the forum: If you have less than 10 posts, expect (and respond to) a request to change your thread title. If you have 10 or more posts, expect your post to be locked, so you can start a new thread with an appropriate title.
To change a Title on your post, click EDIT then Go Advanced and change your title, if 2 days have passed ask a moderator to do it for you.

I've edited your post this time. I strongly suggest that you take a few minutes to actually read the Forum Rules that you agreed to.

can't se why you need code, Data validation would probably work

Your code has undeclared variables such as Row & Number, with no value assigned. Also, I'm fairly sure that Row is reserved by Excel & should not be used as a Variable

To best describe or illustrate your problem you would be better off attaching a dummy workbook, the workbook should contain the same structure and some dummy data of the same type as the type you have in your real workbook - so, if a cell contains numbers & letters in this format abc-123 then that should be reflected in the dummy workbook.

If needed supply a before and after sheet in the workbook so the person helping you can see what you are trying to achieve.

Doing this will ensure you get the result you need!

The problem is that by clearing the cell, you are triggering another _Change event.

Try

Please Login or Register  to view this content.