The following CA Gen functions are used to create, view, or update files and documents on the local or network drives, and are not supported:
The functions OpenExcelDocument, and OpenWordDocument cannot be supported because the client business logic runs on the Application server machine. Access to the file system of the browser's computer is considered a security violation. Also, some of these functions also use OLE objects, which are not supported.
Even though file functions, such as OpenTextFile, are enabled in Web View environments, they are not thread safe. Due to the inherent multi-threaded nature of Web View applications, care must be taken when using file functions. Since no locks are taken on resources accessed by file functions, upon accessing a file from a user session, other users will not be prevented from attempting to access the same resource. This poses potentials for collisions. Furthermore, references to these resources may not be preserved from one request to the next. You will need to Open, Access, and Close within one event action because the information would not be preserved on a second execution if the thread changed. To avoid side effects and collisions between different sessions, you must create a unique file per user session.
Where not supported, action diagram statements are ignored at runtime.
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