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APL NARS2000 possible bug

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[] is the output char, <> is the separator char

A possibile bug but only when there is []IO=1 
program print, and only when there is ")box on"

APL NARS2000 (Win64) Version # 0.5.14.11

      )box on
Was OFF
      {[]<-a<- 1 2 <> []<-'[]IO=',[]IO <> a[2] }
+2---+
¦ 1 2¦
+~---+
+5------+
¦ ?IO= 0¦
++------+
INDEX ERROR
      {[]<-a<- 1 2 <> []<-'[]IO=',[]IO <> a[2] }
      ^
here repeat the linke cancel the first 2 chars of above "[]<-"
      {a<- 1 2 <> []<-'[]IO=',[]IO <> a[2]}
+5------+
¦ ?IO= 1¦
++------+
INDEX ERROR
      {a?1 2???'?IO=',?IO?a[2]}
      ?

this below when box is off... all ok

      )box off
Was ON
      {a<- 1 2 <> []<-'[]IO=',[]IO <> a[2]}
1 2 
[]IO= 1
2

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APL NARS2000 possible bug Rosario19 <Ros@invalid.invalid> - 2025-02-26 18:25 +0100
  Re: APL NARS2000 possible bug Rosario19 <Ros@invalid.invalid> - 2025-02-26 18:34 +0100
  Re: APL NARS2000 possible bug Bob Smith <bsmith@sudleydeplacespam.com> - 2025-03-27 14:57 -0400
    Re: APL NARS2000 possible bug Rosario19 <Ros@invalid.invalid> - 2025-03-30 13:13 +0200

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