Resolves #102 Modified the error message displayed while creating a new instance #103
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I have modified the error message which is displayed while creating a new instance. The error message now clearly specifies the valid length of the instance name. If a user makes instance with name of length 3, then he/she will realise the mistake through the error message and rectify it.
Pic of the old error message
![a](https://user-images.githubusercontent.com/32926581/54717172-912ab080-4b7d-11e9-9143-9d855eac7364.png)
Pic of the modified error message
![b](https://user-images.githubusercontent.com/32926581/54717195-a30c5380-4b7d-11e9-9bf7-8db97f5668d1.png)