Hi Kevin Thank you for your assistance. I was entertaining the idea of the original app existing data interfering with the new project, but not having enough information to know for sure. I still don´t know but I find the error but not the reason, when I made a new test project with the conflicting name such project is created without problem, when I checked the printing capability n the sandbox section I get this message. "This change requires an additional Entitlements file." The result is to entitlement files, the someApp.entitlements and someAppRelease.entitlements after my post of yesterday I decide to dig further and notice than the second file has the com.apple.security.print flag with YES value, but not the original entitlements file, so, if I add manually such flag the app can print while running on Xcode. Like I said this is the bug but I still ignore why Xcode makes the second file and thus provoking this issue. Greetings Alberto V.