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-rw-r--r--js/Threshold/ZCROSS_f.js1
1 files changed, 1 insertions, 0 deletions
diff --git a/js/Threshold/ZCROSS_f.js b/js/Threshold/ZCROSS_f.js
index 88668446..f822d0c1 100644
--- a/js/Threshold/ZCROSS_f.js
+++ b/js/Threshold/ZCROSS_f.js
@@ -34,6 +34,7 @@ function ZCROSS_f() {
this.in1 = int(this.in1);
if (this.in1<=0) {
message("Block must have at least one input");
+ throw "user error";
} else {
var kk = 0;
for (jj=1;jj<=this.in1;jj+=1) {