So this happened to me recently at KCPR... I was cleared to taxi from Atlantic Aviation to Runway 3 via taxiway A at KCPR. While taxiing, I was urgently told to stop by ground control and immediately complied. I had ended up on A5 by mistake and came very close to crossing the hold short line onto runway 03/21 as an aircraft was on short final for runway 3 instead of making the left turn onto A as instructed. The Airport diagram was displayed with safe taxi information on the aircraft's EFB at the time of the occurance, but I was not referencing it at the time as I should have been. This incident could have been prevented with proper use of the taxi diagram and safe taxi feature on the iPad. So obviously pretty significant and thankfully the controller was paying attention otherwise it could have been ugly with the aircraft on approach to runway 3 at the time....Despite all his, I was not given a phone number. I did file an ASRS, but is there anything else I could expect from this or does the lack of phone number indicate no further action can be taken?