TestNG exception when running from Maven - maven

Question

I have a suite of selenium tests divided as java classes. I have a driver script wherein, I create the testng xml suite programmatically and run it. It all works fine when invoked from eclipse or ant. I wanted to replace ant with maven and run the tests. But getting this exception.
[TestRunner] Running the tests in 'TestClass10' with parallel mode:false
[RunInfo] Adding method selector: org.testng.internal.XmlMethodSelector#6076ab2 priority: 10
ERROR::org.testng.TestNGException:
Cannot instantiate class com.prt.regressionsuite.test10.TestClass10
===== Invoked methods
TestDriver.runTestSuite()[pri:0, instance:com.prt.driver.TestDriver#5c73a7ab] 1551083435
POM.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.prt</groupId>
<artifactId>B_Selenium_RC</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<name>B_Selenium_RC</name>
<url>http://maven.apache.org</url>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.2.1</version>
<executions>
<execution>
<goals>
<goal>java</goal>
</goals>
</execution>
</executions>
<configuration>
<mainClass>com.prt.driver.TestDriver</mainClass>
<systemProperties>
<systemProperty>
<timestamp>${timestamp}</timestamp>
</systemProperty>
<systemProperty>
<datestamp>${datestamp}</datestamp>
</systemProperty>
</systemProperties>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>net.sourceforge.jexcelapi</groupId>
<artifactId>jxl</artifactId>
<version>2.6.12</version>
</dependency>
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc14</artifactId>
<version>10.2.0.2.0</version>
</dependency>
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>6.8</version>
</dependency>
<dependency>
<groupId>org.seleniumhq.selenium.server</groupId>
<artifactId>selenium-server</artifactId>
<version>1.0.3-standalone</version>
</dependency>
</dependencies>
</project>
Searched online forums but could not get any solution to this. Please help on this.

Answer 1

When tested by using testng xml and surefire plug in, it showed the actual error about a missing data file. Solved the exception after including the file.
Have to say testng exception message is not really helpful when using the "creating testng programmatically" option.