Use this command to determine if a file was opened in Write mode, i.e. for writing data to. Files that are opened in write mode cannot be read from, and vice-versa.
|ID of file previously opened with fileOpen
// Obtain file ID earlier do some operation to the file
// See if the file was opened in write mode
if( `isFileWriteable $fileID` == true )
print "Can write to the file";
print "Cannot write to the file";