Hercules & MVS 
Frequently Asked Questions

As I rewrote my MVS 3.8 installation instructions, I decided to add this page as a way of handling miscellaneous questions that might arise.  I also tried to remember and include some of the questions that have been asked and answered in the group discussions.  I will be adding to this page, so it might be a good idea to check back from time to time, especially if you have a question you need answered.  


[December 2006] I have been made aware of a compatibility issue when text files (scripts and JCL) from the archives on my site are used on Linux/UNIX systems:

All your shell-Scripts/jcls and *.cnf have the Control-Character "<CTRL>M" at the end of 
the line when I make a "tar -xvzf installmvs.tgz" on the ubuntu Linux-Box and then 
shell-Scripts are not executable within the Shell.

Even though I create all archives using tar under Cygwin rather than using a Windows archive program to make them as compatible as possible between Linux/UNIX and Windows users, this is a problem that can't have a universal solution.  There is a utility that may be run on Linux/UNIX systems - fromdos - that will translate these files so that they will function correctly.  There are a number of sources for the utility; use the search term 'fromdos' in your favorite search engine or use this link:

Tofrodos - Convert text files to/from MSDOS/Windows/Unix (freeware)

[February 2018] As I was making an update to the website today, it occurred to me that I have been remiss in not mentioning somewhere on my site that the exact situation described above has now become the reverse.  I left the Windows world in 2017, most likely for the final time, so now I am creating/editing all text datasets under Linux.  This means that the lines are terminated without including the "<CTRL>M", which will make it necessary for those utilizing the text datasets on a Windows system to use the Tofrodos utility to add the characters to the end of the lines.  An alternative is to edit the datasets with the freely available Notepad++ utility, which will correctly edit the datasets.  I apologize that I have not mentioned this in a more timely manner, but as I have not had anyone pose a question to me about the text datasets, perhaps it has not been as much of a problem as I thought it might be.


General MVS Questions


General Hercules Questions


Console Operations




System Generation / System Setup / System Modification


Application / User Tasks


(Batch Job / Dataset Management)

(Assembling / Compiling / Sorting)

JCL (Job Control Langauge)

If you have questions that I can try to answer for you, please don't hesitate to send them to me:

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This page was last updated on July 15, 2019.