diff --git a/src/LabProcesses.jl b/src/LabProcesses.jl
index e7cc583025c3fc871b1f54e90860fa1242b7ff4a..83713b7af8818368573498b3afe911264840ba8c 100644
--- a/src/LabProcesses.jl
+++ b/src/LabProcesses.jl
@@ -1,4 +1,4 @@
-__precompile__()
+#__precompile__()
 
 module LabProcesses
 
diff --git a/src/controllers.jl b/src/controllers.jl
index 80b00daacc24e6af7e12dcd95e633f0a79d25ed8..eef0983b58c77d56057a7d3a632732fe5685ef77 100644
--- a/src/controllers.jl
+++ b/src/controllers.jl
@@ -15,10 +15,8 @@ function run_control_2DOF(P::AbstractProcess,sysFB, sysFF=nothing; duration = 10
 	u       = zeros(0:h:duration)
 	r       = zeros(0:h:duration)
 
-	sysFB   = minreal(sysFB)
 	stateFB = init_sysfilter(sysFB)
 	if sysFF != nothing
-		sysFF   = minreal(sysFF)
 		stateFF = init_sysfilter(sysFF)
 	end
 
@@ -33,7 +31,7 @@ function run_control_2DOF(P::AbstractProcess,sysFB, sysFF=nothing; duration = 10
 		@periodically h begin
 			y[i]       = measure(P)
 			r[i]       = reference(t)
-			u[i]       = control(i) # y,r must be updated before u
+			u[i]      .= control(i) # y,r must be updated before u
 			control(P, u[i])
 		end
 	end
diff --git a/src/interface_implementations/ballandbeam.jl b/src/interface_implementations/ballandbeam.jl
index e06bda518d12b580ca890f97fd658b725d78a3ec..76d3d75dcb44c6e2ca71a9a19dfe7bf8732c198f 100644
--- a/src/interface_implementations/ballandbeam.jl
+++ b/src/interface_implementations/ballandbeam.jl
@@ -29,12 +29,12 @@ measure(p::BallAndBeam)     = io2num(ccall((:comedi_read,comedipath), Int32,
 control(p::BallAndBeamSimulator, u)  = error("Not yet implemented")
 measure(p::BallAndBeamSimulator)     = error("Not yet implemented")
 
-const comedipath = "../c/comedi_bridge.so"
+const comedipath = Pkg.dir("LabProcesses","c","comedi_bridge.so")
 const conversion = 65535/20
 io2num(x) = x/conversion -10            # Converts from io to float
 num2io(x) = round(Int32,x*100 + 2050)   # Converts from regular number to io
 
 initialize(p::BallAndBeam)  = ccall((:comedi_start, comedipath),Int32,(Int32,), 0)
-finalize(p::BallAndBeam)    = (control(P,0);ccall((:comedi_stop, "../c/comedi_bridge.so"),Int32,(Int32,), 0))
+finalize(p::BallAndBeam)    = (control(p,0);ccall((:comedi_stop, comedipath),Int32,(Int32,), 0))
 initialize(p::BallAndBeamSimulator)  = nothing
 finalize(p::BallAndBeamSimulator)    = nothing
diff --git a/src/utilities.jl b/src/utilities.jl
index 8be25e8df3a7edb707ae26f388072d4744cfd8cf..14373fc50dee800968b666643ecb3e7508a64870 100644
--- a/src/utilities.jl
+++ b/src/utilities.jl
@@ -9,7 +9,7 @@ macro periodically(h, body)
 		local start_time = time()
 		$(esc(body))
 		local execution_time = time()-start_time
-		sleep(max(0,$h-execution_time))
+		sleep(max(0,$(esc(h))-execution_time))
 	end
 end