Hi,
Is there a way to make FASM produce one more file with specified data? For example, dump a list of specified in main source strings to an external file.

In the general case the answer is no.

See the following two topics for some more discussion:

http://board.flatassembler.net/topic.php?t=16889
http://board.flatassembler.net/topic.php?t=15850

Thanks for your answer.

Bad news. I make a binary file of my own format with FASM, and it has exported symbols (they often change while I'm developing the app). I wanted to
1) generate fake windows assembly (DLL) source containing same imports and compile it
2) generate .DEF file for export.
3) make a LIB file from DLL and DEF to use imports in C (a part of code is not in assembler).
Now I have to do it manually each time. Some of these actions can be simpy made by batch files, but they are useless if I have to manually add new exported symbol names to 2 files each time.

Bargest,

fasm has additional output file, namely, its standard output. Some batching can yield any number of resulting files using it.

This problem has already been discussed some times ago. I think this link can help you:

http://board.flatassembler.net/topic.php?t=17035