diff --git a/src/app/app.component.ts b/src/app/app.component.ts
index cf38a7c63c4c1ed2c88e78b66a39f8533855b5d4..59d238cf1e0804dcf833355354bd55cc00271940 100644
--- a/src/app/app.component.ts
+++ b/src/app/app.component.ts
@@ -535,7 +535,14 @@ export class AppComponent implements OnInit, OnDestroy, Observer {
     const list = [];
     for (const c of this._calculators) {
       const uid = c["uid"];
+      const nub = Session.getInstance().findNubByUid(uid);
       list.push({
+        "children": nub.getChildren().map((child) => {
+          return child.uid;
+        }),
+        "requires": nub.getTargettedNubs().map((req) => {
+          return req.uid;
+        }),
         "selected": form ? (uid === form.uid) : true,
         "title": c["title"],
         "uid": uid
diff --git a/src/app/components/dialog-save-session/dialog-save-session.component.html b/src/app/components/dialog-save-session/dialog-save-session.component.html
index f207e5b27df91dbe679139a0f09ea4b2640369cb..d4f2324cc1b63149ee0bd5c0b87cf7594a254054 100644
--- a/src/app/components/dialog-save-session/dialog-save-session.component.html
+++ b/src/app/components/dialog-save-session/dialog-save-session.component.html
@@ -4,7 +4,8 @@
 
   <div mat-dialog-content>
     <div class="cb-container">
-      <mat-checkbox [name]="c.uid" *ngFor="let c of calculators" [(ngModel)]="c.selected">
+      <mat-checkbox [name]="c.uid" *ngFor="let c of calculators" [(ngModel)]="c.selected"
+        (change)="checkLinkedParamsAndModelsDependencies()">
         {{ c.title }}
       </mat-checkbox>
     </div>
@@ -14,6 +15,20 @@
       <button mat-raised-button (click)="selectNone()">{{ uitextNone }}</button>
     </div>
 
+    <div class="dependencies-problems" *ngIf="dependenciesProblems.length > 0">
+      <mat-list role="list">
+        <mat-list-item role="listitem" *ngFor="let dp of dependenciesProblems">
+          <mat-icon color="warn">error_outline</mat-icon> {{ dp.message }}
+        </mat-list-item>
+      </mat-list>
+      <p>
+        <button mat-raised-button (click)="fixDependencies()"
+            [matBadge]="dependenciesProblems.length" matBadgeColor="warn">
+          {{ uitextFixMissingDependencies }}
+        </button>
+      </p>
+    </div>
+
     <mat-form-field>
       <input matInput required [placeholder]="uitextFilenameInput" [(ngModel)]="fileName"
         name="filename" #filename="ngModel" (keydown.enter)="onEnterPressed($event)">
diff --git a/src/app/components/dialog-save-session/dialog-save-session.component.scss b/src/app/components/dialog-save-session/dialog-save-session.component.scss
index e612ad2cf5490552d96d024c1122ef4cd1bbfc1f..f9cad276513dfef8f4fd62cf8ecc57e177dc538b 100644
--- a/src/app/components/dialog-save-session/dialog-save-session.component.scss
+++ b/src/app/components/dialog-save-session/dialog-save-session.component.scss
@@ -17,3 +17,24 @@ mat-form-field {
         margin-right: 5px;
     }
 }
+
+.dependencies-problems {
+
+    .mat-list-base {
+        padding-top: 0;
+
+        .mat-list-item {
+            height: 32px;
+            font-size: .9em;
+
+            ::ng-deep .mat-list-item-content {
+                padding-left: 0;
+
+                mat-icon {
+                    transform: scale(0.8);
+                    margin-right: 5px;
+                }
+            }
+        }
+    }
+}
diff --git a/src/app/components/dialog-save-session/dialog-save-session.component.ts b/src/app/components/dialog-save-session/dialog-save-session.component.ts
index 617557dcc9deb2849ba0a1bf06d77cf9c9490bf3..eac698d910b693c0bda270014b765531b4506702 100644
--- a/src/app/components/dialog-save-session/dialog-save-session.component.ts
+++ b/src/app/components/dialog-save-session/dialog-save-session.component.ts
@@ -13,24 +13,106 @@ export class DialogSaveSessionComponent {
 
     public fileName = "session";
 
+    public dependenciesProblems: any[] = [];
+
     constructor(
       public dialogRef: MatDialogRef<DialogSaveSessionComponent>,
       private intlService: I18nService,
       @Inject(MAT_DIALOG_DATA) public data: any
     ) {
       this.calculators = data.calculators;
+      // run dependency checking at first
+      this.checkLinkedParamsAndModelsDependencies();
     }
 
     public selectAll() {
       for (const c of this.calculators) {
           c.selected = true;
       }
+      // re-run dependency checking
+      this.checkLinkedParamsAndModelsDependencies();
     }
 
     public selectNone() {
       for (const c of this.calculators) {
         c.selected = false;
       }
+      // re-run dependency checking
+      this.checkLinkedParamsAndModelsDependencies();
+    }
+
+    /**
+     * Checks the dependencies between Nubs :
+     *  - linked params depend on their targets
+     *  - PabCloisons depend on their models
+     */
+    public checkLinkedParamsAndModelsDependencies() {
+      console.log("CLPMD !", this.calculators);
+      this.dependenciesProblems = [];
+      // for all checked Nubs
+      this.calculators.forEach((c) => {
+        if (c.selected) {
+          // do all required nubs are checked ?
+          c.requires.forEach((r) => {
+            if (! this.isCalculatorOrParentSelected(r)) {
+              const realUid = this.getUidOrParentUid(r);
+              const depTitle = this.getTitleFromUid(realUid);
+              this.dependenciesProblems.push({
+                requiring: c.title,
+                required: depTitle,
+                requiredUid: realUid,
+                message: c.title + " " + this.intlService.localizeText("INFO_REQUIRES") + " " + depTitle
+              });
+            }
+          });
+        }
+      });
+    }
+
+    public fixDependencies() {
+      for (const dp of this.dependenciesProblems) {
+        this.selectRequiredModule(dp.requiredUid);
+      }
+    }
+
+    private isCalculatorOrParentSelected(uid: string): boolean {
+      let isSelected = false;
+      this.calculators.forEach((c) => {
+        if (c.uid === uid || c.children.includes(uid)) {
+          isSelected = c.selected;
+        }
+      });
+      return isSelected;
+    }
+
+    private getUidOrParentUid(uid: string): string {
+      let realUid: string;
+      this.calculators.forEach((c) => {
+        if (c.uid === uid || c.children.includes(uid)) {
+          realUid = c.uid;
+        }
+      });
+      return realUid;
+    }
+
+    private getTitleFromUid(uid: string): string {
+      let title: string;
+      this.calculators.forEach((c) => {
+        if (c.uid === uid) {
+          title = c.title;
+        }
+      });
+      return title;
+    }
+
+    private selectRequiredModule(uid: string) {
+      this.calculators.forEach((c) => {
+        if (c.uid === uid) {
+          c.selected = true;
+        }
+      });
+      // re-run dependency checking
+      this.checkLinkedParamsAndModelsDependencies();
     }
 
     public saveSession() {
@@ -72,6 +154,10 @@ export class DialogSaveSessionComponent {
       return this.intlService.localizeText("INFO_DIALOG_SAVE_SESSION_FILENAME");
     }
 
+    public get uitextFixMissingDependencies() {
+      return this.intlService.localizeText("INFO_DIALOG_FIX_MISSING_DEPENDENCIES");
+    }
+
     public onEnterPressed(event) {
         this.saveSession();
         return false; // stops event propagation