Hello Sharonlz,
for printing barcodes usually no separate fonts are needed.
The previous Note (#1557674) mentions that barcode fonts can not be used for 2D barcodes. The reason is a technical one: 2D barcodes can not be built up by barcode fonts.
Therefore, the available solutions for AIX 7.1 are: DIMM/SIMM module, new barcode technology (with an upgraded R/3 system), or the ADS can be considered.
Laszlo