diff --git a/nengo_loihi/snips/nengo_io.c.template b/nengo_loihi/snips/nengo_io.c.template
index 86bf3d0cc..d31a48555 100644
--- a/nengo_loihi/snips/nengo_io.c.template
+++ b/nengo_loihi/snips/nengo_io.c.template
@@ -21,7 +21,7 @@ void nengo_io(runState *s) {
     int32_t spike[2];
     int32_t error_info[2];
     int32_t error_data[MAX_ERROR_LEN];
-    int32_t error_index = 0;
+    int32_t error_index;
     int32_t output[N_OUTPUTS];
 
     if (inChannel == -1 || outChannel == -1) {
@@ -44,6 +44,8 @@ void nengo_io(runState *s) {
     }
 
     // Communicate with learning snip
+    s->userData[0] = N_ERRORS;
+    error_index = 1;
     for (int i=0; i < N_ERRORS; i++) {
         readChannel(inChannel, error_info, 2);
         readChannel(inChannel, error_data, error_info[1]);
diff --git a/nengo_loihi/snips/nengo_learn.c b/nengo_loihi/snips/nengo_learn.c
index 4f5cd3332..b53406a6d 100644
--- a/nengo_loihi/snips/nengo_learn.c
+++ b/nengo_loihi/snips/nengo_learn.c
@@ -2,15 +2,14 @@
 #include <string.h>
 #include "nengo_learn.h"
 
-#define N_ERRORS 1
-
 int guard_learn(runState *s) {
     return 1;
 }
 
 void nengo_learn(runState *s) {
-    int offset = 0;
-    for (int error_index=0; error_index < N_ERRORS; error_index++) {
+    int offset = 1;
+    int n_errors = s->userData[0];
+    for (int error_index=0; error_index < n_errors; error_index++) {
         int core = s->userData[offset];
         int n_vals = s->userData[offset+1];
         for (int i=0; i < n_vals; i++) {
@@ -72,5 +71,7 @@ void nengo_learn(runState *s) {
                         .StdpProfile  = 1
                     };
             }
+        }
+        offset += 2 + n_vals;
     }
 }