diff --git a/src/dichotomie.ts b/src/dichotomie.ts
index e748417c9db1e3c3087721f151f988710ecdbbeb..140cc546a3709eada09cd63a8d35701d005081b5 100644
--- a/src/dichotomie.ts
+++ b/src/dichotomie.ts
@@ -73,7 +73,7 @@ export class Dichotomie extends Debug {
         this._startIntervalMaxSteps = n;
     }
 
-    public static get inDico(): boolean {
+    public static get inDicho(): boolean {
         return Dichotomie._inDicho > 0;
     }
 
diff --git a/src/prebarrage/pre_barrage.ts b/src/prebarrage/pre_barrage.ts
index cf57be9ef09b27fff89366aa3528dac4b5bb331a..db12533500a68db07583abc6a3635c88aa321728 100644
--- a/src/prebarrage/pre_barrage.ts
+++ b/src/prebarrage/pre_barrage.ts
@@ -1,4 +1,4 @@
-import { Nub } from "../internal_modules";
+import { Nub, Structure } from "../internal_modules";
 import { ParamCalculability, ParamDefinition } from "../internal_modules";
 import { Result } from "../internal_modules";
 import { PreBarrageParams } from "../internal_modules";
@@ -333,7 +333,18 @@ export class PreBarrage extends Nub {
             return this.result;
         }
 
+        for (const c of this._children) {
+            if (c instanceof PbCloison) {
+                c.inhibitSubmergenceError = true;
+            }
+        }
         const res = super.Calc(sVarCalc, rInit);
+        for (const c of this._children) {
+            if (c instanceof PbCloison) {
+                c.inhibitSubmergenceError = false;
+            }
+        }
+
         // calculate basins so that they have a proper .result
         for (const b of this._bassins) {
             b.Calc();
diff --git a/src/structure/structure.ts b/src/structure/structure.ts
index 763bcb45066d8df048482746af84f5892ac37781..7cb91b8cf4c57d00f55a34b7ae191ba5faaa83bc 100644
--- a/src/structure/structure.ts
+++ b/src/structure/structure.ts
@@ -83,7 +83,7 @@ export abstract class Structure extends ChildNub {
      */
     protected checkSubmergenceMin(res: Result, min: number) {
         // on fait le test si on est pas dans un calcul par dichotomie
-        if (!Dichotomie.inDico && !(this.parent as ParallelStructure)?.inhibitSubmergenceError) {
+        if (!Dichotomie.inDicho && !(this.parent as ParallelStructure)?.inhibitSubmergenceError) {
             const h2h1ratio = this.prms.h2.v / this.prms.h1.v;
             if (h2h1ratio < min) {
                 res.resultElement.addMessage(new Message(