The poster is already a company commander. This problem can be solved through search. Please use search more in the future! Several solutions to error messages during program installation (must read for novices) Error message 1: Certificate expiration Problem description: Software certificate has expired. Solution: 1: Adjust the mobile phone time to within the period of the certificate (adjust the mobile phone time forward a few months) and then install again, after the installation is completed, adjust the time back to the correct time (method to adjust the time: Settings--Mobile Settings--General--Date and Time--Date) Note: The software defaults to a cycle of 3 months, but for It is convenient to adjust it forward one year at a time. If it still prompts that it has expired, you can continue to adjust it forward. If it prompts that the certificate has not yet taken effect or the mobile phone time setting is incorrect, it means you have adjusted too much, please adjust it later. until installed. 2: Re-signing the software error message 2: Certificate error Problem description: 1. The installed software is not signed 2. If it is a JAR program, it is usually because the certificate conflicts. (Many Java games will issue this error message. See the solution below 2) Solution: 1: Sign the software; 2: Install the program (software/game) directly onto the phone or change the memory card. Error message 3: Update error problem Note: This prompt usually occurs because when installing software, there is an old version of the same software in the phone that was not deleted and was repeatedly installed. Or conflicts may occur due to different titles of the new and old software installers. Solution: 1: Uninstall the old version of the software, and then install the new version of the software; 2: Unpack the new version of the software, and change the installer title in the PKG document to be consistent with the old version. Error message four: The certificate is not yet valid. Problem description: Mobile phone The time exceeds the period of the software certificate. Solution: 1: Check whether the date of the mobile phone is set correctly; 2: Adjust the mobile phone time to within the certificate period, and then install it again. After installation, adjust the time back to the correct time. Error message five: The required program access permissions are not granted. Description of the problem: 1. Due to the security issues of the Symbian version 3 system, the permissions of some programs are prohibited. No program can be installed without this permission, or the program has been signed. 2. Certificate error. Solution: 1: Use unsigned software to re-sign it and then install it; 2: Remove the permission restrictions on the mobile phone certificate----XX mobile phone error message 6: The certificate is restricted Problem description: 1: There is an error in signing by the software or the software has been Caused by multiple signatures. 2: A low-privilege certificate signed a high-privilege program. Solution: 1: Use unsigned software to re-sign it and then install it. 2: Verify the certificate permissions required by the program. The certificate permissions must match the program permissions. (Currently, the certificate produced by this forum has 17 permissions. This problem may occur when signing a program with 19 permissions.) Error message 7: Unable to install protected applications provided by untrusted providers. Problem description: There are several possibilities. This problem is caused by: 1. Mobile phone settings problem 2. The software is not signed or the signature is incorrect 3. Certificate conflict. Solution: 1: Enter the "Program Management" of the mobile phone - "Options" - "Settings": set "Install Software" to - All, and set "Online Certificate Check" to - Off; 2: Set the unsigned Re-sign the software before installing; 3: Format the computer before installing (please make a backup before formatting) Error message 8: File is damaged Problem description: The installation program file is damaged or incomplete. It may be during the program download or File corruption caused during solution. Solution: Please make sure the downloaded program file is good. It is recommended to download again (download from other posts) or decompress the program and try again. Error message 9: No prompts. Description of the problem: After the program is installed, it cannot be run when you click its icon. This usually occurs with JAR programs with Chinese file names. Solution: Delete the installed JAR program, change the JAR program file name to all English and try again. Error message 10: The phone fails to start. Description of the problem: This problem usually occurs when restarting the phone after a certain program fails to be installed. Part of it is caused by a failure to upgrade the machine. Solution: If the installation of a certain program fails, just take out the memory card and start the machine again. And delete the incorrectly installed program. If it occurs after the phone is upgraded, then the only option is to reset the phone. It should be noted that some software that starts at startup and resides in the memory cannot be solved by formatting. Therefore, you need to close or delete all these software before soft formatting. Error message 11: This application is for development purposes only. Continued installation may cause serious problems with your device. Problem description: This is the software's disclaimer. Solution: Ignore it and continue the installation! Error message 12: The certificate validity cannot be checked online, please check the settings. Description of the problem: Mobile phone settings problem solution: Settings--Mobile phone settings--Applications--Program management: "Software installation"--Select "All", " "Online Certificate Check" - select "Off". Error message 13: Installation is not supported. Description of the problem: This software is the first or second version of S60. It may also be the software of S80, S90 or Symbian UIQ models. . Version 3 mobile phones cannot be installed. Solution: Find version 3 again. Error message 14: This program is incompatible with mobile phones. Description of the problem: Some may be S60 fifth version software; some have no problems and can be used normally and safely (such as font drivers).

Solution: The fifth version is easy to distinguish, because the fifth version mobile phone is a touch screen machine, so the fifth version software cannot be controlled by the third version. Exit the software and delete it. Then look for the third edition. Of course, there are many new software versions 3 and 5 that are common, and the software will explain it. Error message 15: After installing the program, you cannot click the icon to open it. Description of the problem: 1. Jar format requires changing the file name to English or numbers before installing it. If the name contains Chinese characters, it will not open. 2. If the sis (x) format cannot be opened, it may be due to the lack of PIPS components (such as run player) or PY platform (such as smart unpacking). Solution: 1. Change the file name to English or numbers before installing, such as "face-changing camera.jar" to "blxj.jar" (be careful not to change the suffix) 2. Install the pips component or PY platform.