@Nandhini.Mani

I understand that you are encountering an issue with upgrading, revalidating, and saving your skin in Pega Platform 8.8.1. Specifically, you are receiving an error message stating that "save failed - legacymodeaspectinvokablerulecontainer.invoke.exception." I can imagine that this error message must be frustrating and may hinder your progress on your project. Therefore, I would be happy to provide some insights into the issue and potential solutions.

Firstly, it's important to understand that the "legacymodeaspectinvokablerulecontainer.invoke.exception" error message usually indicates a problem with the upgrade process. It's possible that there may be some legacy code or configuration settings that are causing conflicts with the new version of the platform, leading to the error message.

To resolve this issue, I recommend trying the following steps:

1. Check for any missing hotfixes or patches: Sometimes, errors can occur if there are missing hotfixes or patches. Therefore, it's important to check if any hotfixes or patches are missing and apply them if necessary.
2. Review the upgrade guide: Make sure that you have followed all the steps in the upgrade guide provided by Pega. This guide outlines all the necessary steps to ensure a successful upgrade.
3. Check for customizations: If you have made any customizations to the skin, it's possible that they may be causing the issue. Try removing any customizations and see if the issue persists.
4. Review the logs: Reviewing the logs can provide valuable insights into the issue. Check the PegaRULES logs for any error messages or warnings related to the upgrade process. These logs can help identify the root cause of the issue.
5. Contact Pega support: If none of the above steps resolve the issue, I would recommend reaching out to Pega support for further assistance. They can provide more detailed insights into the issue and help you resolve it.

In conclusion, upgrading, revalidating, and saving skins in Pega Platform 8.8.1 can sometimes be a tricky process, and errors can occur due to various reasons. However, by following the above steps, you can identify and resolve the issue effectively. I hope this helps you resolve the issue and get back on track with your project.