KB442447: Error " System Error 0x00000003 (3): --- The system cannot find the path specified" is received when using dynamic file name feature in Narrowcast

SYMPTOM:
 
When following KB20129 to generate files with dynamic names in Narrowcast, user is receiving below error in DELog:

Temporary delivery failure:
FileStreamLib::FileImpl::WriteToFile: ::Failed to write to file : 'C:\Test\testds2     \My Saved Documents2017-08-22 04.48.01.834.pdf'.
MFileSystem::File::OpenDescriptor: ::CreateFileW failed for 'C:\Test\testds2     \My Saved Documents2017-08-22 04.48.01.834.pdf'.
System Error 0x00000003 (3): --- The system cannot find the path specified.

CAUSE:
User sets up the dynamic subscription set using Subscription table, while Data type Char(20) is used for the address column in the table, thus blank space is added in the end of the string('C:\Test\testds2     '). After modifying the data type to be Varchar(20), Narrowcast could successfully write file into location C:\Test\testds2.
ACTION:
Change the data type to Varchar(x) for the address column.