I see 2 problems.
The first problem may or may not be present in your version depending on what you are running. Nevertheless, here is the solution to both.
Problem 1 : Program not identifying a tube named TUB120603.65. The solution is:
Start the program from its Program Group (instead of double clicking on the STAAD file).
On the opening screen of the program, in the group of buttons titled "Project Tasks", choose Configuration. The "Configure Program dialog" will come up. Choose the tab titled Section Profile Table. In the row titled Indian, click on the right cell. A down arrow ill appear. You will see 2 items - IndianSections and IndianLegacySections. Choose the latter. Click on Accept.
Next try opening the STAAD file.
Problem 2 : Program stops with the message "Above Line contains erroneous data. The solution is:
Your load case is specified in the following manner:
UNIT CM KG
LOAD 1 LOADTYPE Dead TITLE DL
SELFWEIGHT Y -1
START GROUP DEFINITION
FLOOR
_FR1BMS 116 TO 121 131 TO 137 145 TO 150
_FR2BMS 57 TO 64 89 91 93 99 TO 102 110 TO 112 116 TO 121
END GROUP DEFINITION
UNIT MMS NEWTON
FLOOR LOAD
YRANGE 0 0 FLOAD -0.0001 XRANGE 3325 5494 ZRANGE -4000 4000 GY
Righ in the midst of load case 1, you have a group definition. Re-arrange the order of those lines to
UNIT CM KG
START GROUP DEFINITION
FLOOR
_FR1BMS 116 TO 121 131 TO 137 145 TO 150
_FR2BMS 57 TO 64 89 91 93 99 TO 102 110 TO 112 116 TO 121
END GROUP DEFINITION
UNIT MMS NEWTON
LOAD 1 LOADTYPE Dead TITLE DL
SELFWEIGHT Y -1
FLOOR LOAD
YRANGE 0 0 FLOAD -0.0001 XRANGE 3325 5494 ZRANGE -4000 4000 GY
With these changes, the file runs. But there are a number of warnings stating that the FLOOR LOAD isn't getting generated. Check the XRANGEs and ZRANGEs. I checked a few and found that the panels within these ranges are not closed boundaries.
You also need to check the units of the Young's Modulus (E) in the Material data. There is a warning mentioning that
A STIFF MATERIAL WITH 7.208E+01 TIMES THE STIFFNESS OF STEEL ENTERED.