A development model provided by the ability framework. It is the only application development model supported by API version 8 and earlier. The FA model provides [FAs](#fa) and [Particle abilities (PAs)](#pa). The FA supports the Page ability template, and the PA supports the Service, Data, and Form ability templates. For details, see [FA Model Overview](application-dev/ability/fa-brief.md).
A development model provided by the ability framework. It is the only application development model supported by API version 8 and earlier. The FA model provides [FAs](#fa) and [Particle abilities (PAs)](#pa). The FA supports the Page ability template, and the PA supports the Service, Data, and Form ability templates. For details, see [FA Model Overview](application-dev/ability-deprecated/fa-brief.md).
1. Check whether the identified exception is caused by an incorrect access path of the application source code. You can check the correctness of an access path against [Sandbox File Access Specifications](#sandbox-file-access-specifications).
2. If the application source code accesses an incorrect path, change the path access policy. Specifically, use the **Context** API rather than the absolute path to access the **/data** directory. For details about the **Context** API, see the following documents:
3. If the exception is caused by a third-party module invoked by the application and the application source code does not use an absolute path to access files, proceed as follows:
