rewrite the existing code for charts

Hi,

-You should provide appropriate error handling to manage:
Values in the Arrows table on the Control Panel worksheet evaluating to error values.
Chart names specified in the Arrows table(table present on worksheet) not existing on the worksheet.
-The error handling should not halt the code, but log the error and ensure that the worksheet is left in a protected state.


please kindly help on this.

thank you.