The terms and condition of using RivEX are described here, please ensure you understand.

  • You use the RivEX tool at your own risk. The author of RivEX will not be held responsible for loss of data and/or earnings if data corruption occurs during the installation or running of the RivEX tool. The author of RivEX will not be held responsible for any decisions based upon incorrect attribution values created by RivEX due to incorrect network topology. Advice is given in this help file on how to correct errors. You should always check the output of any automated calculation. 

  • RivEX will make changes to the attribute table of your data (e.g. when computing stream order or building node ID values).

WarningAlways work from a backed up copy of your data!

  • The RivEX tool is locked to a single Windows Operating System (the ID number you gave when you purchased RivEX). If you wish to run more than one copy of RivEX you need to purchase a license for each Windows Operating System. 

  • If you upgrade or replace a computer I am happy to reissue you with a new license file free of charge. 

  • RivEX is developed in ArcPro 3.2 on a Windows 11 operating system with English localisation. The Author can provide only limited support for RivEX running on older operating systems such as Microsoft Windows Windows 8.  RivEX requires shapely 2.0.1 to be installed.

  • For each copy you purchase you are entitled to all upgrades and patches for the major release version. Each major release of RivEX is synchronised with my need to purchase a new license each year from ESRI. The license model that ESRI has for ArcPro is essentially a subscription for 1 year and it's not cheap!  So when I renew my ArcPro license (February of each year) I consider that as a new major release of RivEX.  RivEX will not time out for you and as long as you keep your ArcPro subscription up to date you'll be able to continue to use RivEX.  If I release any updates/patches within 1 year of your purchase you will be able to take advantage of these. If it's been over 1 year since your purchase then please purchase a new copy of RivEX as ArcPro is really expensive!

  • Your details (Name, Email and Windows registration number) will NEVER be shared with anyone else.  Your details are stored "off-line" in a database. 

  • RivEX will contact you using the email address you submitted to send you the license file and to inform you of any new releases. 

  • RivEX uses Pay Pal for a secure credit card transaction.  RivEX uses a verified Pay Pal account. To purchase this tool via Pay Pal you do not have to open a Pay Pal account .  Their website encourages you but it is optional.  RivEX never stores or even sees your personal account information. 

  • Due to the low price this tool sells for and the charges that PayPal levy on me for you to be able to purchase with a credit card it is not viable to give a refund if RivEX was purchased in error.

  • The Author of RivEX will attempt to answer any problems within 48 hours of receipt of an email ( This may not always be the case if you email during the weekend or the author is on vacation. 

  • The Author of RivEX reserves the right to alter the specifications of RivEX and update the terms in condition of use as of when needed.