# Error in compilator **URL:** \ **Category:** General Discussion\ **Created:** [June 30, 2023, 6:58am UTC](https://community.freefem.org/t/error-in-compilator/2570 "2023-06-30T06:58:32Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![jawahar264](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/jawahar264/32/1783_2.png) [@jawahar264](https://community.freefem.org/u/jawahar264)\ **Post date:** [June 30, 2023, 6:58am UTC](https://community.freefem.org/t/error-in-compilator/2570/1 "2023-06-30T06:58:32Z")
load “msh3” load “bem” real k = 10; int n = 100; border circle(t = 0, 2\*pi){x=cos(t); y=sin(t);} meshL ThL = buildmeshL(circle(n)); ThL = OrientNormal(ThL,unbounded=1); BemKernel Ker(“SL”, k=2\*pi); varf vbem(u,v) = int1dx1d(ThL)(ThL)(BEM(ker,u,v)); fespace Uh(ThL,P1); HMatrix H = vbem(Uh,Uh); func uinc = exp(1i_k_x); Uh p, b; varf vrhs(u,v) = -int1d(ThL)(uinc\*v); b = vrhs(0,Uh); p = H^-1\*b; BemPotential Pot(“SL”, k=2\*pi); varf vpot(u,v) = int1d(ThL)(POT(Pot,u,v)); int np = 200; int R = 4; border b1(t=-R, R){x=t; y=-R;} border b2(t=-R, R){x=R; y=t;} border b3(t=-R, R){x=-t; y=R;} border b4(t=-R, R){x=-R; y=-t;} mesh ThOut = buildmesh(b1(np)+b2(np)+b3(np)+b4(np)+circle(-n)); fespace UhOut(ThOut,P1); HMatrix HP = vpot(Uh,UhOut); UhOut u, utot; u = HP\*p; utot = u + uinc; plot(utot,fill=1,value=1,cmm=“u\_total”); **Error** – FreeFem++ v4.6 (Fri, Apr 03, 2020 2:08:08 PM - git v4.6) Load: lg\_fem lg\_mesh lg\_mesh3 eigenvalue 1 : load “msh3”(load: loadLibary C:\Program Files (x86)\FreeFem++\.\msh3 = 0) 2 : load “bem”(load: loadLibary C:\Program Files (x86)\FreeFem++\.\bem = 0) 3 : real k = 10; 4 : int n = 100; 5 : border circle(t = 0, 2_pi){x=cos(t); y=sin(t);} 6 : meshL ThL = buildmeshL(circle(n)); 7 : ThL = OrientNormal(ThL,unbounded=1); 8 : BemKernel Ker(“SL”, k=2_pi) Error line number 8, in file C:\Users\jawahar ali\OneDrive\Desktop\freefemm\bdm.edp, before token ) They are used Named parameter current line = 8 Compile error : They are used Named parameter line number :8, ) error Compile error : They are used Named parameter line number :8, ) code = 1 mpirank: 0 ---
**Author:** ![phtournier](https://avatars.discourse-cdn.com/v4/letter/p/3da27b/32.png) [@phtournier](https://community.freefem.org/u/phtournier)\ **Post date:** [June 30, 2023, 11:41am UTC](https://community.freefem.org/t/error-in-compilator/2570/2 "2023-06-30T11:41:59Z")
your FreeFEM version (4.6) is too old and does not support Boundary Element formulations. Consider upgrading FreeFEM to v4.13 (v4.12 will do too, binaries are here [Release FreeFEM v4.12 · FreeFem/FreeFem-sources · GitHub](https://github.com/FreeFem/FreeFem-sources/releases/tag/v4.12)) ---
**Author:** ![jawahar264](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/jawahar264/32/1783_2.png) [@jawahar264](https://community.freefem.org/u/jawahar264)\ **Post date:** [July 1, 2023, 8:03am UTC](https://community.freefem.org/t/error-in-compilator/2570/3 "2023-07-01T08:03:57Z")
\*\*Not compiling with new version also \*\* – FreeFem++ v4.12 (Wed Feb 15 11:36:54 CET 2023 - git v4.12-27-g58d32866) file : C:\Users\jawahar ali\OneDrive\Desktop\freefemm\bdm.edp Load: lg\_fem lg\_mesh lg\_mesh3 eigenvalue 1 : load “msh3”(load: loadLibary C:\Program Files (x86)\FreeFem++\.\msh3 = 0) 2 : load “bem”(load: loadLibary C:\Program Files (x86)\FreeFem++\.\bem = 0) Init\_Bem ``` 3 : real k = 10; 4 : int n = 100; 5 : border circle(t = 0, 2*pi){x=cos(t); y=sin(t);} 6 : meshL ThL = buildmeshL(circle(n)); 7 : ThL = OrientNormal(ThL,unbounded=1); 8 : BemKernel Ker("SL", k=2*pi) 9 : varf ``` Error line number 9, in file C:\Users\jawahar ali\OneDrive\Desktop\freefemm\bdm.edp, before token varf syntax error current line = 8 Compile error : syntax error line number :9, varf error Compile error : syntax error line number :9, varf code = 1 mpirank: 0 try getConsole C:\Users\jawahar ali\OneDrive\Desktop\freefemm\bdm.edp save log in : ‘C:\Users\jawahar ali\OneDrive\Desktop\freefemm\bdm.log’ wait enter ? ---
**Author:** ![phtournier](https://avatars.discourse-cdn.com/v4/letter/p/3da27b/32.png) [@phtournier](https://community.freefem.org/u/phtournier)\ **Post date:** [July 1, 2023, 9:57am UTC](https://community.freefem.org/t/error-in-compilator/2570/4 "2023-07-01T09:57:42Z")
missing semicolon line 8 ? ---
**Author:** ![jawahar264](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/jawahar264/32/1783_2.png) [@jawahar264](https://community.freefem.org/u/jawahar264)\ **Post date:** [July 1, 2023, 10:26am UTC](https://community.freefem.org/t/error-in-compilator/2570/5 "2023-07-01T10:26:55Z")
i copy pasted the example in documentation on BEM You chose the file “C:\Users\jawahar ali\OneDrive\Desktop\freefemm\try.edp” – FreeFem++ v4.12 (Wed Feb 15 11:36:54 CET 2023 - git v4.12-27-g58d32866) file : C:\Users\jawahar ali\OneDrive\Desktop\freefemm\try.edp Load: lg\_fem lg\_mesh lg\_mesh3 eigenvalue 1 : load “bem”(load: loadLibary C:\Program Files (x86)\FreeFem++\.\bem = 0) Init\_Bem ``` 2 : load "msh3"(load: loadLibary C:\Program Files (x86)\FreeFem++\\.\msh3 = 0) 3 : real k = 10; 4 : int n = 100; 5 : border circle(t = 0, 2*pi){x=cos(t); y=sin(t);} 6 : meshL ThL = buildmeshL(circle(n)); 7 : ThL = OrientNormal(ThL,unbounded=1); 8 : varf vbem(u,v) = int1dx1d(ThL)(ThL)(BEM(BemKernel("SL",k=k),u,v)); 9 : fespace Uh(ThL,P1); ``` 10 : HMatrix H = vbem(Uh,Uh); 11 : func uinc = exp(1i_k_x); 12 : Uh p, b; 13 : varf vrhs(u,v) = -int1d(ThL)(uinc_v); 14 : b[] = vrhs(0,Uh); 15 : p[] = H^-1_b; 16 : varf vpot(u,v) = int1d(ThL)(POT(BemPotential(“SL”,k=k),u,v)); 17 : int np = 200; 18 : int R = 4; 19 : border b1(t=-R, R){x=t; y=-R;} 20 : border b2(t=-R, R){x=R; y=t;} 21 : border b3(t=-R, R){x=-t; y=R;} 22 : border b4(t=-R, R){x=-R; y=-t;} 23 : mesh ThOut = buildmesh(b1(np)+b2(np)+b3(np)+b4(np)+circle(-n)); 24 : fespace UhOut(ThOut,P1); 25 : HMatrix HP = vpot(Uh,UhOut); 26 : UhOut u, utot; 27 : u = HP\*p; 28 : utot = u + uinc; 29 : plot(utot,fill=1,value=1,cmm=“u\_total”); sizestack + 1024 =2256 ( 1232 ) – FESpace: Nb of Nodes 100 Nb of DoF 100 Attempting to use an MPI routine before initializing MPI try getConsole C:\Users\jawahar ali\OneDrive\Desktop\freefemm\try.edp save log in : ‘C:\Users\jawahar ali\OneDrive\Desktop\freefemm\try.log’ wait enter ? ---
**Author:** ![phtournier](https://avatars.discourse-cdn.com/v4/letter/p/3da27b/32.png) [@phtournier](https://community.freefem.org/u/phtournier)\ **Post date:** [July 1, 2023, 11:53am UTC](https://community.freefem.org/t/error-in-compilator/2570/6 "2023-07-01T11:53:17Z")
You need to run FreeFEM in parallel, i.e. with FreeFem++-mpi or ff-mpirun, as FreeFEM uses the parallel library htool under the hood for BEM ---
**Author:** ![jawahar264](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/jawahar264/32/1783_2.png) [@jawahar264](https://community.freefem.org/u/jawahar264)\ **Post date:** [July 3, 2023, 5:31am UTC](https://community.freefem.org/t/error-in-compilator/2570/7 "2023-07-03T05:31:04Z")
– FreeFem++ v4.12 (Wed Feb 15 11:36:54 CET 2023 - git v4.12-27-g58d32866) file : .\mesh.edp Load: lg\_fem lg\_mesh lg\_mesh3 eigenvalue parallelempi 1 : 2 : load “bem”(load: loadLibary C:\Program Files (x86)\FreeFem++\.\bem = 0) Init\_Bem ``` 3 : load "msh3"(load: loadLibary C:\Program Files (x86)\FreeFem++\\.\msh3 = 0) 4 : real k = 10; 5 : int n = 100; 6 : border circle(t = 0, 2*pi){x=cos(t); y=sin(t);} 7 : meshL ThL = buildmeshL(circle(n)); 8 : ThL = OrientNormal(ThL,unbounded=1); 9 : varf vbem(u,v) = int1dx1d(ThL)(ThL)(BEM(BemKernel("SL",k=k),u,v)); ``` 10 : fespace Uh(ThL,P1); 11 : HMatrix H = vbem(Uh,Uh); 12 : func uinc = exp(1i_k_x); 13 : Uh p, b; 14 : varf vrhs(u,v) = -int1d(ThL)(uinc_v); 15 : b[] = vrhs(0,Uh); 16 : p[] = H^-1_b; 17 : varf vpot(u,v) = int1d(ThL)(POT(BemPotential(“SL”,k=k),u,v)); 18 : int np = 200; 19 : int R = 4; 20 : border b1(t=-R, R){x=t; y=-R;} 21 : border b2(t=-R, R){x=R; y=t;} 22 : border b3(t=-R, R){x=-t; y=R;} 23 : border b4(t=-R, R){x=-R; y=-t;} 24 : mesh ThOut = buildmesh(b1(np)+b2(np)+b3(np)+b4(np)+circle(-n)); 25 : fespace UhOut(ThOut,P1); 26 : HMatrix HP = vpot(Uh,UhOut); 27 : UhOut u, utot; 28 : u = HP\*p; 29 : utot = u + uinc; 30 : plot(utot,fill=1,value=1,cmm=“u\_total”); sizestack + 1024 =2256 ( 1232 ) – FESpace: Nb of Nodes 100 Nb of DoF 100 \*\* fgmres has converged in 26 iterations The relative residual is 8.9438e-07 Cl: 0.618035 – mesh: Nb of Triangles = 63398, Nb of Vertices 32149 Plot:: Sorry no ps version for this type of plot 11 times: compile 0.172s, execution 2.632s, mpirank:0 ######## We forget of deleting 57 Nb pointer, 0Bytes , mpirank 0, memory leak =0 CodeAlloc : nb ptr 4524, size :590968 mpirank: 0 Ok: Normal End ---
**Author:** ![phtournier](https://avatars.discourse-cdn.com/v4/letter/p/3da27b/32.png) [@phtournier](https://community.freefem.org/u/phtournier)\ **Post date:** [July 3, 2023, 7:46am UTC](https://community.freefem.org/t/error-in-compilator/2570/8 "2023-07-03T07:46:59Z")
It works, but with parallel FreeFEM you need to add the command line flag ‘-wg’ (with graphics) to see plots ---
**Author:** ![jawahar264](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/jawahar264/32/1783_2.png) [@jawahar264](https://community.freefem.org/u/jawahar264)\ **Post date:** [July 3, 2023, 9:37am UTC](https://community.freefem.org/t/error-in-compilator/2570/9 "2023-07-03T09:37:07Z")
Thanks you for the help I am really grateful and your lecture on BEM also helpful while learning as there are very little recourses in web.