Dear All, 

I’m developting an application on the device with Tizen SDK 2.3.0. 

In this regard, I tried to install the TPK via ‘my files’ but filed with message of ‘Unable to install this file. The format is invalid.’. 

Since I found several articles about similar problems here, I’m sure that the TPK already got certificated with proper certificates. 

By the way, I found below logs from Tizen IDE.

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04-13 18:10:06.989 : ERROR / PKGMGR ( 10903 : 10903 ) : pkgmgr-internal.c: _get_type_from_zip(681) > /opt/usr/media/com.xxx.yyy-1.0.0-arm.tpk is core

04-13 18:10:07.059 : ERROR / rpm-installer ( 10903 : 10903 ) : librpm.c: __is_core_tpk_app(285) > tizen-manifest.xml is not found.
04-13 18:10:07.069 : ERROR / rpm-installer ( 10903 : 10903 ) : librpminternals.c: _librpm_get_package_header_info(161) > Could not read package file
04-13 18:10:07.069 : ERROR / PKGMGR ( 10903 : 10903 ) : pkgmgr.c: pkgmgr_client_check_pkginfo_from_file(3468) > [pkgmgr_client_check_pkginfo_from_file(): 3468](ret != 0) get_pkg_detail_info_from_package failed for path[/opt/usr/media/com.xxx.yyy-1.0.0-arm.tpk]
04-13 18:10:07.069 : ERROR / INSTALLER ( 10903 : 10903 ) : installer_package_manager.c: get_package_info_from_file(147) > get_package_info_from_file pkgmgr_client_check_pkginfo_from_file(/opt/usr/media/com.xxx.yyy-1.0.0-arm.tpk) is failed.
04-13 18:10:07.069 : ERROR / INSTALLER ( 10903 : 10903 ) : installer.c: _get_packageInfo(710) > _get_packageInfo package_info is NULL
04-13 18:10:07.069 : ERROR / INSTALLER ( 10903 : 10903 ) : installer.c: _app_create(758) > _app_create _get_packageInfo() failed.

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And I also figured out that izen-manifest.xml was in the TPK. 

Please let me know if any one knows the cause. 

Thanks a lot for the answer in advance.