Got this error message after converting project from 6.10.7 to 7.0

java.lang.IllegalArgumentException: Property cuba.dbmsType is not found. Check app.properties file.
	at com.haulmont.studio.backend.util.Preconditions.checkNotNullArgument(Preconditions.java:44)
	at com.haulmont.studio.backend.ed.ddl.DdlLoader.getDbScriptsPath(DdlLoader.java:423)
	at com.haulmont.studio.backend.ed.ddl.DdlLoader.getDbUpdateScriptsPath(DdlLoader.java:412)
	at com.haulmont.studio.backend.ed.ddl.DdlLoader.getExistingUpdatesFilenames(DdlLoader.java:280)
	at com.haulmont.studio.backend.ed.ddl.DdlLoader.getUnappliedUpdates(DdlLoader.java:361)
	at com.haulmont.studio.intellij.action.cubamenu.runmenu.StartAction.doActionPerformed(StartAction.java:96)
	at com.haulmont.studio.intellij.action.CubaProjectAction.actionPerformed(CubaProjectAction.java:76)
	at com.intellij.openapi.actionSystem.ex.ActionUtil$1.run(ActionUtil.java:258)
	at com.intellij.openapi.actionSystem.ex.ActionUtil.performActionDumbAware(ActionUtil.java:275)
	at com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter.lambda$actionPerformed$0(ActionMenuItem.java:287)
	at com.intellij.openapi.wm.impl.FocusManagerImpl.runOnOwnContext(FocusManagerImpl.java:283)
	at com.intellij.openapi.wm.impl.IdeFocusManagerImpl.runOnOwnContext(IdeFocusManagerImpl.java:106)
	at com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter.actionPerformed(ActionMenuItem.java:277)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
	at com.intellij.openapi.actionSystem.impl.ActionMenuItem.lambda$fireActionPerformed$0(ActionMenuItem.java:111)
	at com.intellij.openapi.application.TransactionGuardImpl.runSyncTransaction(TransactionGuardImpl.java:88)
	at com.intellij.openapi.application.TransactionGuardImpl.lambda$submitTransaction$1(TransactionGuardImpl.java:111)
	at com.intellij.openapi.application.TransactionGuardImpl.submitTransaction(TransactionGuardImpl.java:120)
	at com.intellij.openapi.application.TransactionGuard.submitTransaction(TransactionGuard.java:122)
	at com.intellij.openapi.actionSystem.impl.ActionMenuItem.fireActionPerformed(ActionMenuItem.java:111)
	at com.intellij.ui.plaf.beg.BegMenuItemUI.doClick(BegMenuItemUI.java:522)
	at com.intellij.ui.plaf.beg.BegMenuItemUI.access$300(BegMenuItemUI.java:35)
	at com.intellij.ui.plaf.beg.BegMenuItemUI$MyMouseInputHandler.mouseReleased(BegMenuItemUI.java:544)
	at java.awt.Component.processMouseEvent(Component.java:6548)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3325)
	at java.awt.Component.processEvent(Component.java:6313)
	at java.awt.Container.processEvent(Container.java:2237)
	at java.awt.Component.dispatchEventImpl(Component.java:4903)
	at java.awt.Container.dispatchEventImpl(Container.java:2295)
	at java.awt.Component.dispatchEvent(Component.java:4725)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4889)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4526)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4467)
	at java.awt.Container.dispatchEventImpl(Container.java:2281)
	at java.awt.Window.dispatchEventImpl(Window.java:2746)
	at java.awt.Component.dispatchEvent(Component.java:4725)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:764)
	at java.awt.EventQueue.access$500(EventQueue.java:98)
	at java.awt.EventQueue$3.run(EventQueue.java:715)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
	at java.awt.EventQueue$4.run(EventQueue.java:737)
	at java.awt.EventQueue$4.run(EventQueue.java:735)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:734)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:719)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:664)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:363)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

There is no opportunities to edit this file as source file in Intelij.

Hi, @kjell1906.

This error occurs when trying to start a project. Please check that the file ‘app.properties’ in core module in your project exists. This file must contain the ‘cuba.dbmsType’ property. Studio does not delete the property(‘cuba.dbmsType’) when migrating. You can track changes by git history and/or local history in IDEA.