Details

This message is generated by an attempt to open a file that is already open.
This message is caused by using OpenWrite or OpenAppend with a file that has already been opened for reading or writing.
Streams[] gives the list of files that are currently open.
For most files only one output stream may be open to the file at a time.
Off[message] switches off the message; On[message] switches it on. For example: Off[General::aofil].

Examples

An error occurs when OpenWrite is used with a file that is already open:

Wolfram Language code: OpenWrite["TESTFILE"]

Close the file:

Wolfram Language code: Close["TESTFILE"]

Top