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Verify that the mart is r7.x or later. If it is a release earlier than r7.x, you must upgrade to r7.x before you can upgrade to r8. We recommend you upgrade to the latest service pack for CA ERwin MM r7.3, and then open and save your models older than r7.x in CA ERwin MM r7.3.x before you upgrade to CA ERwin Data Modeler Workgroup Edition r8.
It is also recommended that if you plan to uninstall the r7.x program, that you create backups of your models before upgrading to r8. Otherwise, installations of r7.x and r8 can coexist on the same machine, as long as you ensure adequate hard drive and memory resources.
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