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Crypto 1F 88 problems?



As you can see from my other posts I'm not getting too much help here but through trial and error I am getting further on to making my J*S*T*V mosc. In order to find D5 10 data I tried an A4 A4 00 00 02 1F 88 INS to select file 1F 88 today in Crypto2001 and in Meti8. Both progs returned 94 04 as ACK - which I believe is an error/file not selected msg. Why is this? Any help appreciated. Thanks.