Net name generation is based on the connected component and pin designators. Take a look at the warnings below the errors. T1 seems to have a duplication in the pin designators (pin 1 and 2). Try to solve this problem first.
T1 is the transformer that I have created. I have checked all pins and its designators and found that they are all different. Duplicate net names wire means?
Have you eliminated the duplicate pin error yet? If the system still thinks there are duplicates then it will still need fixing. Is your transformer a single symbol or multi-part symbol?
On your screenshot I see two pins with the designator 1. (Lower end of the top right inductor and the upper pin of the lower left inductor). Please check, if you mistakenly took "pins" instead of lines to draw the parts of the transformer.
Thank you sir, actually when I created my component I attached extra pins being unaware that inductor symbol that I took already had pins.Due to this it was showing duplicate net names error.
