Do I need to recompile matconvnet everytime I start matlab?

As the title says. Everytime I start matlab I get this error

Undefined variable "dagnn" or class "dagnn.DagNN.loadobj".

The error goes when I recompile the library using:

>> vl_compilenn('enableGpu', true, 'cudaRoot', '/usr/local/cuda-9.0', 'cudaMethod', 'nvcc')

Answer 1

[Priyank Sharma]

Execute the following commands in MATLAB Command prompt:

 >>restoredefaultpath
 >>rehash toolboxcache
 >>savepath

These steps would allow you to reset your default path and clear the toolbox cache to make sure that the function would be accessible.