How do you use a context variable in tSystem component?

[talendtester]

I have two context variables which are assigned values:
context.oldFileName
context.newFileName
I want DOS to rename the old file name with the new file name.
I think my tSystem component Command should look something like this:
"cmd /c echo "+ context.oldFileName+ context.newFileName+" "
or this:
cmd /c REN %oldFileName% %newFileName%
When I run the Command " cmd /c echo "+ context.oldFileName+ context.newFileName+" "
The result is "nullnull"
How do I get the tSystem to know the values of context.oldFileName and context.newFileName?

[Anonymous]

Why not just use tFileCopy?
It supports rename and keeps everything 'talend' and is cross platform.

[_AnonymousUser]

Don't forget that Talend provides components to do this type of stuff tFile* which is preferable to dropping out to the OS

[talendtester]

tFileCopy would take a long time to run for large files.
It looks like my job is getting the values but its failing on the tSystem:
The system cannot find the file specified.
tContextLoad_1 set key "newFileName" with value "#$%&-_+.txt"
tContextLoad_1 set key "newFileName" with value "BatchFile.bat"
tContextLoad_1 set key "newFileName" with value "testFile.txt"
.-----------+-------------+-----------+---------------.
| tLogRow_1 |
|=----------+-------------+-----------+--------------=|
|key2 |value2 |key |value |
|=----------+-------------+-----------+--------------=|
|newFileName|#$%&-_+.txt |oldFileName|!@#$%&()-_+.txt|
|newFileName|BatchFile.bat|oldFileName|BatchFile.bat |
|newFileName|testFile.txt |oldFileName|testFile.txt |
'-----------+-------------+-----------+---------------'

[alevy]

So are the values getting to tSystem now? Have you tried just echoing them?
Is the path correct? Try just the "cd" command to check what path tSystem thinks it's in.

[talendtester]

Not sure why it works, but it does!
I ended up putting Iterate from the tFileInputDelimited to the tSystem.
This is the tSystem command that worked for me:
"cmd /c ren \""+context.oldFileName+"\" \""+context.newFileName+"\""