What is the impact of b1/b2 visa cancelled without prejudice?
You weren’t told to come back and apply for a B visa. You were told to come back and apply for an H-1B visa. The significance or major effect of the cancellation of your B visa means that the consulate did not want you going back to the U.S. as a B nonimmigrant and then changing status again. When a visa is CWOPed, it implies that the bearer of the visa could get another one, if he qualified. It means that the visa was not cancelled pursuant to 22 CFR 41. 122. It was cancelled as a matter of discretion. They didn’t want you going back to the U.S. claiming to be “just visiting” when your true purpose would be to work as an H-1B. They forced you to either get the H-1B visa or stay in India. The Canadians have their own criteria for visa issuance. They might be interested in why your U.S. visa was cancelled.