Exporting report doesn't work

Exporting report doesn't work as shown below:

![image](https://github.com/wenbostar/PDV/assets/5302110/436b7780-6212-4127-8e80-fe61a1421398)


```
Exception in thread "Export" java.lang.ArrayIndexOutOfBoundsException: Index 1 out of bounds for length 1
	at PDVGUI.gui.PDVMainClass.getSpectrum(PDVMainClass.java:3912)
	at PDVGUI.utils.ExportReports$1.run(ExportReports.java:152)
```