Compiler/TMS320F28379D: %f formatting does not work, the %g does

Part Number:TMS320F28379D

Tool/software: TI C/C++ Compiler

I am using the sprintf function in a C++ class function to format a string of text and when I try and use the %f formatting for a float, long double or anything the processor hangs in the sprintf routine or generates garbage for text. The %g format seems to work OK, but it has limited formatting. I am using CCS 7.4.0.00015.

Thanks