There may be several reasons why an ADA may have called you to to say not to come. It is possible that the ADA and defense counsel may have agreed to continue the case to another date or they may have reached an agreement on a plea agreement making it unlikely that the case would go to trial. If you are concerned, you may still attend the court date as it will be open to the public, and If you are the victim in this case, I would recommend speaking with a representative of the DA such as the victim witness advocate assigned to this case. Best of luck
The information contained in this response should not be construed to be formal legal advice nor the formation of an attorney-client relationship.
Chances are that the case was not going to be able to go to trial on that day. This could be for several reason, such as the defense attorney advanced and moved the case etc. Call the victim witness advocate for the DA office to get clarification on what happened.
This is not intended as legal advice and does not create an attorney-client relationship.