
210 Chapter 7
O:\Manuals\E6380A_Progguid\Book\Mencard.fm
Memory Cards/Mass Storage
DOS File System Considerations
Potential File Name Conflicts
Unexpected file operation can occur if proper consideration is not given
to the different file system naming conventions and the Test Set file
entry field width.
• A full DOS file name is 12 characters (8 character file name + . + 3
character extension). A full DOS file name will not fit in the Test
Set’s file entry field.
• Any file with a .PGM extension is considered a Tests Subsystem code
file. If the Tests Subsystem attempts to retrieve a file which is not a
code file, the following error will be generated: Error reading code
file. Check file and media.
• Any file with a .PRC extension is considered a Tests Subsystem
procedure file. If the Tests Subsystem attempts to retrieve a file
which is not a procedure file, the following error will be generated:
Error reading procedure file. Check file and media.
• Any file with a .LIB extension is considered a Tests Subsystem
library file. If the Tests Subsystem attempts to retrieve a file which
is not a library file, the following error will be generated: Error
reading library file. Check file and media.
• When reading files from mass storage, the Test Set interprets the “.”
(period) as a delimiter and ignores any following characters. File
extensions will be stripped off by the Test Set before displaying the
filename in the file list. This could result in Error 54 Duplicate
File Name.
• When reading files from mass storage, the Test Set truncates
filenames with more than 8 characters. This could result in Error
54 Duplicate File Name.
• When storing or deleting files, the file name is silently truncated to 8
characters since DOS only allows 8-character file names. This could
result in ERROR 54 Duplicate File Name.
File Naming Recommendations
The following naming conventions are recommended.
• Ensure that only Tests Subsystem procedure files use the .PRC
extension.
• Ensure that only Tests Subsystem library files use the .LIB
extension..
• Ensure that only Tests Subsystem code files use the .PGM
extension..
• Ensure that only Save/Recall register files use the .SAV extension..
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