Not able to build covnetjs using ant

I tried running ant from build.xml directory. It is able to run concat target, but throwing error at compress target. Below are the logs.

```
Buildfile: C:\Users\manish_bansal01\Desktop\106Work\Covenetjs\convnetjs-master\convnetjs-master\compile\build.xml

concatenate:

compress:
[apply] java.io.FileNotFoundException: Usersmanish_bansal01Desktop106WorkCov
enetjsconvnetjs-masterconvnetjs-mastercompile..buildconvnet-min.js:\Users\manish
_bansal01\Desktop\106Work\Covenetjs\convnetjs-master\convnetjs-master\build\conv
net.js (The filename, directory name, or volume label syntax is incorrect)
[apply] at java.io.FileOutputStream.open(Native Method)
[apply] at java.io.FileOutputStream.(FileOutputStream.java:212)
[apply] at java.io.FileOutputStream.(FileOutputStream.java:104)
[apply] at com.yahoo.platform.yui.compressor.YUICompressor.main(YUICompr
essor.java:183)
[apply] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[apply] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAcces
sorImpl.java:57)
[apply] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMet
hodAccessorImpl.java:43)
[apply] at java.lang.reflect.Method.invoke(Method.java:601)
[apply] at com.yahoo.platform.yui.compressor.Bootstrap.main(Bootstrap.ja
va:21)
[apply] Result: 1

BUILD SUCCESSFUL
Total time: 3 seconds
```