RL-ARM: L9937E: RL-ARM is not allowed with this license

Information in this knowledgebase article applies to:

• Keil MDK
• RL-ARM Real-Time Library

SYMPTOM

I am a user of Keil MDK who has to maintain an old project which requires the installation of the RL-ARM Real-Time Library.

But while building my project I see this error message:

Error: L9937E: RL-ARM is not allowed with this license

CAUSE

The former combination of Keil MDK and RL-ARM required individual product serial numbers (PSNs) for each product.

With the release of Keil MDK 4.20, the RL-ARM middleware libraries became part of Keil MDK-Professional, registered by a single PSN. Users that have updated their product have received this single, Keil MDK-Professional PSN, and no longer need an RL-ARM PSN.

The L9937E error message now appears when building projects with a version of Keil MDK older than 4.20 but in combination with a non-registered version of RL-ARM.

RESOLUTION

It is mandatory to possess a PSN for RL-ARM if you use a Keil MDK version older than V4.20.

To obtain a PSN for RL-ARM, contact your local distributor, who will inform you about limitations, pricing, installation etc.

Note:

It is recommended to install that Keil MDK 4 and RL-ARM version into a separate folder.

MORE INFORMATION

• Refer to Keil RL-ARM Real-Time Library

• Refer to RL-ARM User's Guide in the RL-ARM User's Guide (MDK v4).

• Refer to Getting Started with RL-ARM

Last Reviewed: Monday, October 19, 2020