Afaik this is not possible. The CP3 stands for Component Package 3 and mainly updates your components to a newer version. For existing projects you may keep the original components without updating them.
The SP1 is Service Package and shows that the IDE has got new or corrected features or a newer GCC version.
You may look into Creator Release Notes to see what actually did change.
Updating to the new version breaks some projects for me built with older version of PSoC Creator with the following message.
E1216: Routing of net Net_199 Failed. Source : :m0s8tcpwmcell_7.tr_compare_match, Sink : :m0s8tcpwmcell_3.stop
You can run two major version (e.g. 3.3 and 3.2) in parallel, but I'm not sure whether you can run 3.3 SP1 and 3.3 CP1 in parallel. But there should be no need to do that - the should be identical in terms of functionality (and even bugs), and the older versions of the component are still available.
There are two scenarios possible: The older version has a bug or the newer one has got it. I would always assume the former case.
Is it possible that you post your complete project, so that we all can have a look at all of your settings. To do so, use
Creator->File->Create Workspace Bundle (minimal)
and attach the resulting file.
If not, I would suggest you to get in contact with Cypress directly: At top of this page select "Design support -> Create a Support Case" and attach your progect bundle. Cypress will keep your information confidentially and you will be helped by a Cypress engineer.
Thanks for the quick replies. I will get in touch with Cypress immediately.
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Bob and hli are correct that you cannot install multiple copies of PSoC Creator 3.3. You can only install different products, such as 3.2 and 3.3. The SP1 and CP3 are just different versions of the same product. It is a bit confusing and we are moving to a simpler "Update #" nomenclature soon.
The routing issue is a concern though, especially since it is happening on the newer software. But there is not much we can do on this forum without seeing the project. Please do contact our support department - they are responsive and experienced guys who will help you.