The MCNP Forum is an email-based communication system for users and developers to ask questions and share information with each other.

Access to the MCNP User Forum requires having a licensed copy of the MCNP software. Please see this page for how to obtain an MCNP software license. Once you have a license, please proceed to following the steps below.

Subscribing

To subscribe to the list mcnp-forum@lanl.gov, send an email to listmanager@lanl.gov with the following in the body of the email:

subscribe mcnp-forum [email-address]
end

where the email address inside the square brackets (typed without the brackets) is needed only if it is not the same as the email address from which the request is issued.

Once the registration request has been received, a form will be provided that must be completed and returned to the forum manager for access to be granted. If after three business days this form hasn't been received, please contact mcnp_help@lanl.gov and request it.

Unsubscribing

To unsubscribe from the list, send an email to listmanager@lanl.gov with the following in the body of the email:

unsubscribe mcnp-forum [email-address]
end

where the email address inside the square brackets (typed without the brackets) is needed only if it is not the same as the email address from which the request is issued.

Posting Messages to the Forum

Only forum subscribers can post messages to the MCNP forum.

To post a message, send the message in an email addressed to mcnp-forum@lanl.gov.

Tips for Posting a "good" Forum Message

Because support via the MCNP Forum is provided on a "best-effort" basis, the following are tips that may help prompt answers and/or discussion on MCNP Forum questions.

If asking a question:

• Provide a minimal example input file that motivates the question. Doing so will save those interested in responding from having to start of scratch and guess what you are trying to do. If asking how to do something, this is an excellent opportunity to demonstrate what you've tried (in an organized manner).
• Identify the operating system, version of the MCNP code, and any special compilation and execution options you're using.