Pega 7.3 is a pre-requisite for AES 7.3.0.1 as per my knowledge, so it's failing in this case. It may be due to the modified table structure for AES 7.3.0.1 or it could be any other reason.

I have answered the related query on this post "Pre-requisite questions regarding AES 7.3" 

Upgrade Pega Platform to 7.3, and then verify your installation as described in the Platform Installation Guide for your environment, available on the Deployment Guides page.

Upgrading to Pega Autonomic Event Services 7.3 

Please refer both the links for the detailed explanations.

Hope it answers your query, kindly notify by marking this post as answered for larger Pega audience and tracking purposes.

Regards,

Asif

Hi Monika,

Adding to Asif's comment, you also need to install the hotfixes mentioned in the below link before proseeding to the AES installation:

https://community.pega.com/knowledgebase/articles/pega-autonomic-event-services-hotfixes

Regards,

Vikash

AES 7301 was never tested on Pega722. Use Pega 731