Convert Tab delimited strings

I had an issue to process a csv file with TAB delimited text lines. The existing code expected text lines with ; as delimiter. Character TAB has ASCII Code 9. So i wrote following code:

ConvertTabString(line : Text[250]) : Text[250]
ch := 9; // of type Char
line := CONVERTSTR(line,FORMAT(ch),';');
exit(line);

test code:

// set a line value or load the line from a text file using file.open
line := 'ab cd  ef  cd'; 
line := ConvertTabString(line);
MESSAGE(line);

result: 'ab;cd;ef;cd'

an interesting thing is, that this code does not work for older nav 2009 builds. maybe a problem with the encoding. for that case i developed a second version.

// text file test.txt contains 1 text line 'ab cd  ef  cd'. with TAB as delimiter.
// file : FILE
// instr : InStream
file.OPEN('c:\temp\test.txt');
file.CREATEINSTREAM(instr);
instr.readtext(line,maxstrlen(line));
line := CONVERTSTR(line,FORMAT(ch),';');
message(line);
file.close;

This can also be used to export the converted lines to a new text file, which can then be imported via dataport/xmlport. cheers