Hi Shashank,
The tool generates many warnings when you attempt to simulate -- you should work on getting those cleared out first.
SPICE simulators usually work by first finding the DC operating state of a system, which means all capacitors become open circuits and all inductors become short circuits. If a net is left completely disconnected during that process, it will throw errors.
You can fix this a few different ways - typically the easiest way is to add a large resistance from that node to a node with a known voltage.
Many of the errors you had were just for not connecting wires to anything. In Cadence PSpice, you can connect wires just with naming, but in Tina-TI, you need to end the wire on some component. If the wire just needs to be connected to another on the other side of the page, like what you have, you have essentially three options:
(1) Directly wire the ports together. This can look messy, but is quick and easy.
(2) Terminate both disconnected wires into a large resistor. From the simulation perspective, this should not affect your results, but will eliminate the errors.
(3) Use jumper components to connect the nets.
I have done all 3 in the attached file, and you will find that it simulates without issues.
