DSXchange

If its just if then else statments then you can write that in a stage variable inside the transformer. I dont think you should have any problem.

Best to get in touch with support as 8.0 is still new in the market and not very many users.

Welcome Aboard
No book on datastage. The closest you can get is manuals. If your new, you need formal training and/or guidance.

For implementing datawarehouses, wow, thats a huge conversation. I suggest you read Ralph Kimbal or Inmon books.
A source stage can handle any amount of data, there is no limitation.
If you divide it in chunks, thats ok. This way you can extract in chunks by utilizing multiple instance jobs.

If it really is a mainframe job. The OP has another duplicate post in the px forum.

Thats right we dont. We only have MVS job type. Sorry, my bad. If its a px job then there are certain ways this can be done. For instance if your column is of type varchar, do StringToDate(in.PWD) It will not fit the date format and hence give you stars. If the field can have less character...

I have seen this error before. I did nothing, just re-ran the job and it was fine. My DBA couldnt tell what really happened as the error did'nt reproduce the next time.
Try re-running the job again.

So now you have to make sure your jobs finish within 3 days

Are you using MVS version? If yes please post in that forum? If not then please explain.
If your using px then you can do replacement in the transformer using different functions.

No, I meant before feeding into the filter stage, make sure the data has '0X0' in it.

I would say any OS level activities would use the tmp directory like sorting etc. by default. Other processes occupy specific directories present in the Project home directory.

Guru sounds a lot easier then all

Where is this shell variable present? Use a routine to invoke the file that sets this shell variable and within the same routine read the value using echo $SHELLVARIABLE. It will spit out the value. All this can be done using DSExecute() within a routine.

Please verify that you are actually getting the desired result out of the source before jumping to the statement " It does'nt work".