diff --git a/packages/composer-playground/src/app/test/test.component.html b/packages/composer-playground/src/app/test/test.component.html
index e980ed5230..83acc10f58 100644
--- a/packages/composer-playground/src/app/test/test.component.html
+++ b/packages/composer-playground/src/app/test/test.component.html
@@ -36,7 +36,7 @@ <h3>All Transactions</h3>
 
   <div class="side-button">
     <div class="button-item">
-    <button type="button" class="primary" (click)="submitTransaction()">
+    <button [disabled]="!hasTransactions" type="button" class="primary" (click)="submitTransaction()">
       <span>Submit Transaction</span>
     </button>
     </div>
diff --git a/packages/composer-playground/src/app/test/test.component.spec.ts b/packages/composer-playground/src/app/test/test.component.spec.ts
index 12c681b997..2f4223383a 100644
--- a/packages/composer-playground/src/app/test/test.component.spec.ts
+++ b/packages/composer-playground/src/app/test/test.component.spec.ts
@@ -17,6 +17,9 @@ import * as sinon from 'sinon';
 
 import * as chai from 'chai';
 import { BusinessNetworkConnection } from 'composer-client';
+import { Introspector,
+         BusinessNetworkDefinition,
+         TransactionDeclaration } from 'composer-common';
 
 let should = chai.should();
 
@@ -48,8 +51,16 @@ describe('TestComponent', () => {
     let mockAlertService;
     let mockTransactionService;
     let mockModal;
-
+    let mockIntrospector;
+    let mockBusinessNetwork;
     let mockBusinessNetworkConnection;
+    let mockTransaction;
+
+    class MockModelClass {
+        isAbstract(): boolean {
+            return true;
+        }
+    }
 
     let sandbox;
 
@@ -61,6 +72,12 @@ describe('TestComponent', () => {
         mockAlertService = sinon.createStubInstance(AlertService);
         mockModal = sinon.createStubInstance(NgbModal);
         mockBusinessNetworkConnection = sinon.createStubInstance(BusinessNetworkConnection);
+        mockBusinessNetwork = sinon.createStubInstance(BusinessNetworkDefinition);
+        mockIntrospector = sinon.createStubInstance(Introspector);
+        mockTransaction = sinon.createStubInstance(TransactionDeclaration);
+
+        mockClientService.getBusinessNetwork.returns(mockBusinessNetwork);
+        mockBusinessNetwork.getIntrospector.returns(mockIntrospector);
         mockTransactionService = sinon.createStubInstance(TransactionService);
         mockBusinessNetworkConnection.listenerCount.returns(0);
         mockBusinessNetworkConnection.on = sinon.stub();
@@ -87,7 +104,9 @@ describe('TestComponent', () => {
     });
 
     describe('ngOnInit', () => {
+
         beforeEach(() => {
+            mockIntrospector.getClassDeclarations.returns([mockTransaction]);
             mockAlertService.errorStatus$ = {next: sinon.stub()};
         });
 
@@ -95,13 +114,52 @@ describe('TestComponent', () => {
             component.should.be.ok;
         });
 
-        it('should load all the registries', fakeAsync(() => {
+        it('should load all the registries and hasTransactions should be true', fakeAsync(() => {
+            mockInitializationService.initialize.returns(Promise.resolve());
+
+            mockBusinessNetworkConnection.getAllAssetRegistries.returns(Promise.resolve([{id: 'asset.fred'}, {id: 'asset.bob'}]));
+            mockBusinessNetworkConnection.getAllParticipantRegistries.returns(Promise.resolve([{id: 'participant.fred'}, {id: 'participant.bob'}]));
+            mockBusinessNetworkConnection.getTransactionRegistry.returns(Promise.resolve('transactionRegistry'));
+            mockClientService.getBusinessNetworkConnection.returns(mockBusinessNetworkConnection);
+
+            component.ngOnInit();
+            tick();
+
+            mockClientService.getBusinessNetworkConnection.should.have.been.called;
+            mockBusinessNetworkConnection.getAllAssetRegistries.should.have.been.called;
+
+            component['assetRegistries'].length.should.equal(2);
+
+            component['assetRegistries'][0].should.deep.equal({id: 'asset.bob', displayName: 'bob'});
+            component['assetRegistries'][1].should.deep.equal({id: 'asset.fred', displayName: 'fred'});
+
+            mockBusinessNetworkConnection.getAllParticipantRegistries.should.have.been.called;
+
+            component['participantRegistries'].length.should.equal(2);
+
+            component['participantRegistries'][0].should.deep.equal({id: 'participant.bob', displayName: 'bob'});
+            component['participantRegistries'][1].should.deep.equal({id: 'participant.fred', displayName: 'fred'});
+
+            mockBusinessNetworkConnection.getTransactionRegistry.should.have.been.called;
+
+            component['transactionRegistry'].should.equal('transactionRegistry');
+
+            component['chosenRegistry'].should.deep.equal({id: 'participant.bob', displayName: 'bob'});
+
+            mockClientService.getBusinessNetwork.should.have.been.called;
+            mockBusinessNetwork.getIntrospector.should.have.been.called;
+            mockIntrospector.getClassDeclarations.should.have.been.called;
+            component.hasTransactions.should.be.true;
+        }));
+
+        it('should load all the registries and hasTransactions should be false', fakeAsync(() => {
             mockInitializationService.initialize.returns(Promise.resolve());
 
             mockBusinessNetworkConnection.getAllAssetRegistries.returns(Promise.resolve([{id: 'asset.fred'}, {id: 'asset.bob'}]));
             mockBusinessNetworkConnection.getAllParticipantRegistries.returns(Promise.resolve([{id: 'participant.fred'}, {id: 'participant.bob'}]));
             mockBusinessNetworkConnection.getTransactionRegistry.returns(Promise.resolve('transactionRegistry'));
             mockClientService.getBusinessNetworkConnection.returns(mockBusinessNetworkConnection);
+            mockIntrospector.getClassDeclarations.returns([new MockModelClass()]);
 
             component.ngOnInit();
 
@@ -127,6 +185,11 @@ describe('TestComponent', () => {
             component['transactionRegistry'].should.equal('transactionRegistry');
 
             component['chosenRegistry'].should.deep.equal({id: 'participant.bob', displayName: 'bob'});
+
+            mockClientService.getBusinessNetwork.should.have.been.called;
+            mockBusinessNetwork.getIntrospector.should.have.been.called;
+            mockIntrospector.getClassDeclarations.should.have.been.called;
+            component.hasTransactions.should.be.false;
         }));
 
         it('should set chosen registry to first asset one if no participant registries', fakeAsync(() => {
@@ -218,7 +281,6 @@ describe('TestComponent', () => {
     });
 
     describe('submitTransaction', () => {
-        let mockTransaction;
         beforeEach(() => {
             mockTransaction = sinon.createStubInstance(Resource);
             mockTransaction.getIdentifier.returns(1);
diff --git a/packages/composer-playground/src/app/test/test.component.ts b/packages/composer-playground/src/app/test/test.component.ts
index 9a8bcd1e34..b41c2fda27 100644
--- a/packages/composer-playground/src/app/test/test.component.ts
+++ b/packages/composer-playground/src/app/test/test.component.ts
@@ -5,6 +5,7 @@ import { ClientService } from '../services/client.service';
 import { InitializationService } from '../services/initialization.service';
 import { AlertService } from '../basic-modals/alert.service';
 import { TransactionComponent } from './transaction/transaction.component';
+import { TransactionDeclaration } from 'composer-common';
 import { TransactionService } from '../services/transaction.service';
 
 @Component({
@@ -17,6 +18,7 @@ import { TransactionService } from '../services/transaction.service';
 
 export class TestComponent implements OnInit, OnDestroy {
 
+    hasTransactions = false;
     private assetRegistries = [];
     private participantRegistries = [];
     private transactionRegistry = null;
@@ -34,9 +36,18 @@ export class TestComponent implements OnInit, OnDestroy {
     ngOnInit(): Promise<any> {
         this.initializeEventListener();
         return this.initializationService.initialize()
-            .then(() => {
-                return this.clientService.getBusinessNetworkConnection().getAllAssetRegistries();
-            })
+        .then(() => {
+
+            let introspector = this.clientService.getBusinessNetwork().getIntrospector();
+            let modelClassDeclarations = introspector.getClassDeclarations();
+            modelClassDeclarations.forEach((modelClassDeclaration) => {
+                // Generate list of all known (non-abstract) transaction types
+                if (!modelClassDeclaration.isAbstract() && modelClassDeclaration instanceof TransactionDeclaration) {
+                    this.hasTransactions = true;
+                }
+            });
+
+            return this.clientService.getBusinessNetworkConnection().getAllAssetRegistries()
             .then((assetRegistries) => {
                 assetRegistries.forEach((assetRegistry) => {
                     let index = assetRegistry.id.lastIndexOf('.');
@@ -78,6 +89,10 @@ export class TestComponent implements OnInit, OnDestroy {
             .catch((error) => {
                 this.alertService.errorStatus$.next(error);
             });
+        })
+        .catch((error) => {
+            this.alertService.errorStatus$.next(error);
+        });
     }
 
     ngOnDestroy() {