Hi Tugba,
I tried to install 'Eclipse IDe for Java EE Developers' as was mentioned in SAP forum (http://scn.sap.com/thread/3249251) . I tried to upgrade my SAP hana studio to Version 1.0.7 so it will suit to SAPUI5 version 1.00.6 both downloaded from SAP site (https://hanadeveditionsapicl.hana.ondemand.com/hanadevedition/) .
Even though SAPUI5 installation failed with the same message error :
An error occurred while collecting items to be installed
session context was:(profile=hdbstudio, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/features/com.sap.ide.ui5.app.feature.external_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/features/com.sap.ide.ui5.app.feature.external_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/features/com.sap.ide.ui5.app.feature.lang_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/features/com.sap.ide.ui5.app.feature.lang_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ide.ui5.app.plugin_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ide.ui5.app.plugin_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ide.ui5.app.plugin.lang_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ide.ui5.app.plugin.lang_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ide.ui5.common_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ide.ui5.common_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ide.ui5.common.lang_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ide.ui5.common.lang_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ide.ui5.ctrl.metamodel_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ide.ui5.ctrl.metamodel_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ide.ui5.services_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ide.ui5.services_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ide.ui5.services.lang_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ide.ui5.services.lang_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.suite.suite-ui-commons_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.suite.suite-ui-commons_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.branding_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.branding_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.commons_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.commons_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.core_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.core_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.makit_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.makit_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.mobile_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.mobile_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.mobile-ext_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.mobile-ext_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.resource_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.resource_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.resource.osgi_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.resource.osgi_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.richtexteditor_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.richtexteditor_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/features/com.sap.ui5.runtime.feature_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/features/com.sap.ui5.runtime.feature_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.table_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.table_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.themelib_sap_goldreflection_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.themelib_sap_goldreflection_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.themelib_sap_ux_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.themelib_sap_ux_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/features/com.sap.ui5.uilib.feature_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/features/com.sap.ui5.uilib.feature_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.utils_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.utils_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.ux3_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.ux3_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.visualization_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.visualization_1.12.5.jar
Artifact not found: jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.viz_1.12.5.jar.
jar:file:/C:/Users/peers/Downloads/artifacts.jar!/plugins/com.sap.ui5.viz_1.12.5.jar