SPD error .The URL../_Catalogs/masterpage is invalid

http://www.dlocc.com/articles/sharepoint-masterpage-is-invalid-error-solution/

File Not found error after creating site from Site Template

Useful Sharepoint Designer Activity.

Useful Sharepoint Designer Activity.

1.      Install “Useful Sharepoint Designer Activities  0.5.0 Alpha” from http://www.codeplex.com/spdactivities

2.      Extract all files in the archive to a single location.

3.      Run setup.exe

4.      Go to Central Administration -> Application Management ->Activate feature “Useful Sharepoint Designer Activities 0.5.0 Alpha”

The breakpoint will not currently be hit. No Symbols have been loaded for this document.

Many time it happens even after attaching w3wp.exe process break point do not hits and gives error/warning as "The breakpoint will not currently be hit. No Symbols have been loaded for this document." when we hover on break point.

# Make sure you are applying break point on application resides on same server where you
# Clear all browser cache , copy the URL close the browser , open new instance and there put URL.
# Rebuild application properly with erros before appling breakpoints

# Last but very important Make sure you are building application in "Debug" mode.