[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Tracing](./puppeteer.protocol.tracing.md) > [TracingCompleteEvent](./puppeteer.protocol.tracing.tracingcompleteevent.md) > [dataLossOccurred](./puppeteer.protocol.tracing.tracingcompleteevent.datalossoccurred.md) ## Protocol.Tracing.TracingCompleteEvent.dataLossOccurred property Indicates whether some trace data is known to have been lost, e.g. because the trace ring buffer wrapped around. Signature: ```typescript dataLossOccurred: boolean; ```