Closure notices and a new chain-link fence are now spreading the message that east Vancouver’s weekend warriors have lost a prime battle field.The softball field, outdoor basketball court and walking track at Nautilus Inc.’s headquarters were closed officially on Monday and construction permits have been granted to turn the sports site into additional parking stalls in preparation for new tenant Hewlett-Packard, expected to move into 68,000 square feet, or one floor of the three-level building, this year.Building owner Portland-based Pac-Trust is constructing the parking lot to accommodate HP, which will share the massive 480,000-square-foot building with Nautilus. Times have changed for the now-struggling fitness equipment company, which today employs about half the 500-person staff it had when it took over the building near Mill Plain Boulevard and 164th Avenue as a world headquarters in 2005. The company spent $15 million converting the former manufacturing building into upscale offices with curved lines inspired by the company’s circular logo, and putting in sports facilities, such as the softball diamond, basketball hoops and track.The sporting areas and an adjoining football/soccer field were always available to the public and it appears the football field will remain open directly behind the Nautilus building, south of the Columbia Crossing retail center. But plans for 448 new parking spaces would pave over the softball diamond and basketball courts. The existing parking lot now accommodates 770 vehicles. City officials say they have not received any citizen comments about Pac-Trust’s plans to develop the parking, proposed since October. Development proposal notices were mailed out to residents within 500 feet of the project on Oct. 18. The public comment period lasted through Nov. 1, said Jon Wagner, a senior planner with the city’s Development Review Department.