I get this error when writing (appending) to a file that has a size of 4G. The error message says that the origin of the error is "Format Into String". Actually, the error is produced by "Format Into File" in the false case of "Append to TextFile.vi".
It seems to me that there is some outdated 32-bit code in "Format Into File" which is responsible for this error.
The true case of "Append to TextFile.vi" contains a workaround that uses "Format Into String" and "Write to Binary File" and does not expose this error.
Tested with LabVIEW 2011 SP1, 2012 and 2013 SP1. The behaviour is always the same.
Here is how I tested: "Loop On Append to TextFile.vi" runs "Append to TextFile.vi" until an error occures. (You will have to abort the looping caller VI if no error occures - which I did at a file size of ~25G).
Can anyone put some light on this behaviour? Thanks for any replies in advance.
Note: Make sure to verify this on a file system that supports files with a size of greater than 4GB.
Note: Do not forget to delete the text file after investigating.