How to check meter firmware version?

Dear Team,

Our meters support automated firmware update from FTP server. We need to keep track of which meter has the old firmware version and which has the new one. For this, we want to read the meter firmware info and determine the version.

We tried to follow steps similar to the firmware transfer. But doesn't seem to be working. The GXDLMSImageActivateInfo seems to be empty.

Here is the code. We're trying to match imageIdentifier with getIdentification() value.

GXReplyData reply = new GXReplyData();
GXDLMSImageTransfer target = new GXDLMSImageTransfer("0.0.44.0.1.255");

log.info("Check that image transfer is enabled ");
//Check that image transfer is enabled.
checkImageTransferEnable(target, reply);

log.info("Step 1: Read image block size");
//Step 1: Read image block size.
Object imgBlock = readObject(target, 2);
target.setImageBlockSize((Long) imgBlock);
log.info("setImageBlockSize " + target.getImageBlockSize());

log.info("Step 6: Before activation, the Image is checked");
// Step 6: Before activation, the Image is checked;
//Get list to images to activate.
Object imageActivateInfo = readObject(target, 7);
target.setImageActivateInfo((GXDLMSImageActivateInfo[]) imageActivateInfo);
log.info("imageActivateInfo: " + Arrays.toString(target.getImageActivateInfo()));

for (GXDLMSImageActivateInfo it : target.getImageActivateInfo()) {
log.info("is " + imageIdentifier + " == " + it.getIdentification().toString());
if (it.getIdentification().toString().equals(imageIdentifier)) {
return true;
}
}

return false;