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  1. ,

    Thrown when an application is trying to use or access an object whose reference equals to null but if you are getting no message, try using the option -XX:-OmitStackTraceInFastThrow.

java.lang.NullPointerException: lock == null at java.io.Reader.<init>(Reader.java:64) at java.io.InputStreamReader.<init>(InputStreamReader.java:122) at java.io.InputStreamReader.<init>(InputStreamReader.java:59) at com.robotium.solo.WebUtils.getJavaScriptAsString(WebUtils.java:354) at com.robotium.solo.WebUtils.prepareForStartOfJavascriptExecution(WebUtils.java:162) at com.robotium.solo.WebUtils.executeJavaScriptFunction(WebUtils.java:276) at com.robotium.solo.WebUtils.executeJavaScript(WebUtils.java:238) at com.robotium.solo.WebUtils.getWebElements(WebUtils.java:111) at com.robotium.solo.Searcher.searchForWebElement(Searcher.java:238) at com.robotium.solo.Waiter.waitForWebElement(Waiter.java:498) at com.robotium.solo.Solo.waitForWebElement(Solo.java:672)