I installed “PointSpreadFunctions, View5D, IndexFunArrays, Noise, FFTW, NDTools, FourierTools, DeconvOptim” packages but I have gotten these errors in my code during compiling.
ERROR: UndefVarError: conv_psf not defined
 top-level scope
Anyone help me out please
julia> using PointSpreadFunctions, View5D, IndexFunArrays, Noise, FFTW, NDTools, FourierTools, DeconvOptim
┌ Warning: JavaCall needs the environment variable `JULIA_COPY_STACKS` to be `1` or `yes`.
│ Calling the JVM may result in undefined behavior.
└ @ JavaCall ~/.julia/packages/JavaCall/MlduK/src/JavaCall.jl:53
so things seem to work just fine - please do read the thread linked by Adrian and provide some more information on what you did to get that error.