run failed while deploying process

Failed to create a BarResource for form custompage_firmOrderConformationForm
org.bonitasoft.studio.designer.core.bar.CustomPageBarResourceFactory.newBarResource(CustomPageBarResourceFactory.java:52)
org.bonitasoft.studio.designer.core.bar.FormMappingBarResourceProvider.addFormMapping(FormMappingBarResourceProvider.java:87)
org.bonitasoft.studio.designer.core.bar.FormMappingBarResourceProvider.newFormMappingModel(FormMappingBarResourceProvider.java:76)
org.bonitasoft.studio.designer.core.bar.FormMappingBarResourceProvider.addResourcesForConfiguration(FormMappingBarResourceProvider.java:68)
org.bonitasoft.studio.engine.export.BarExporter.createBusinessArchive(BarExporter.java:117)
org.bonitasoft.studio.engine.export.BarExporter.createBusinessArchive(BarExporter.java:91)
org.bonitasoft.studio.engine.export.BarExporter.createBusinessArchive(BarExporter.java:165)
org.bonitasoft.studio.engine.operation.DeployProcessOperation.deployProcess(DeployProcessOperation.java:172)
org.bonitasoft.studio.engine.operation.DeployProcessOperation.deploy(DeployProcessOperation.java:153)
org.bonitasoft.studio.engine.operation.DeployProcessOperation.run(DeployProcessOperation.java:120)
org.bonitasoft.studio.engine.operation.RunProcessOperation.run(RunProcessOperation.java:83)
org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)