It is worth mentioning to your child's doctor that he/she is not interested in solids. My daughter is almost 15 months old and from the very beginning, she's never really eaten them. Maybe a bite or two here and there, but nothing approaching a normal intake for her age (or any age, really). For months on end, I tried everything. I have even given my child all the things I always said I would never give her, just because I was so desperate to get her to eat SOMETHING. I mean, what kid doesn't like french fries? Candy? Or ice cream? Mine.
Turns out she has oral and texture aversion. We now see a speech therapist 3 times a week for occupational therapy. Yes, a speech therapist is helping her learn how to eat. It does NOT come naturally for some children. Our speech therapist also sees many children with dysphagia, which is when a child has painful swallowing due to an unseen problem with the structure of the mouth, tongue, or throat.
Our speech therapist has said the biggest problem with oral aversions is that most parents just assume their child is "picky" or will eventually "come around." But the reality is that oral aversions start out as such, then gradually become ingrained and behavioral. Case in point: My neighbor's son, who is 6, was just dx'd with texture aversion. He eats soft white bread (no butter), vanilla pudding, mashed potatoes, and that's pretty much it. No exaggeration. My neighbor said he started out just like my daughter, and she was never concerned. But as the years went by, it never got better, and actually got worse. If it's an oral or texture issue, you want to get it dx'd and treated earlier rather than later, when it becomes much, much harder to treat.
After a month of therapy, we're already seeing a drastic improvement in her solids intake. She's still nowhere near eating what she should be, and every month since 9 months, she's dropped on the percentiles chart, but it's beginning to get better.
Anyway, I know I am a newbie here, but I just wanted to offer a different perspective. I would mention it to your child's doctor, just to make sure you aren't dealing with something more.
Hope that helps and good luck!