The problem with travel history is that your mother has not traveled before. If she had traveled previously, they would be more comfortable that she was someone who would return to her home country. But since she hasn't, it has the appearance that she is more likely to be moving permanently.
Also, since she doesn't have family ties in her country, they are not convinced she would return home.
That's how CIC thinks. So it's up to you to convince them that your mother would return home and not stay in Canada to, for instance, help take care of your new baby.
She has ties in her country . She has an rent apartment, bank account, land property, home property, my two sisters, 5 nephews and nices and she is going to show in this application all of this. but I was more concern about Record of travel.
I am not sure, but is it possible that she has not filled the form properly?
Everyone has a first time!
Make sure to put N/A where ever that is not applicable for your case.
Also include all documents that will show her ties to her country.
Maybe somewhere she said she has traveled, but has left the "travel history" section empty!