The steady state is complex (the sum of square residuals of imaginary parts of the steady state is 0.0000)

Dear all,In solving steady state, the residuals of all equations are 0. Why is the following error displayed? Looking forward to your help, thank you!

Residuals of the static equations:

Equation number 1 : 0 : 1
Equation number 2 : 0 : 2
Equation number 3 : 0 : 3
Equation number 4 : 0 : Ya
Equation number 5 : 0 : Pag
Equation number 6 : 0 : Pang
Equation number 7 : 0 : Yag
Equation number 8 : 0 : Vag
Equation number 9 : 0 : wag
Equation number 10 : 0 : Raz
Equation number 11 : 0 : Ragk
Equation number 12 : 0 : Yang
Equation number 13 : 0 : Vang
Equation number 14 : 0 : wang
Equation number 15 : 0 : 15
Equation number 16 : 0 : Rangk
Equation number 17 : 0 : 17
Equation number 18 : 0 : Ka
Equation number 19 : 0 : Kag
Equation number 20 : 0 : phiak
Equation number 21 : 0 : Za
Equation number 22 : 0 : 22
Equation number 23 : 0 : 23
Equation number 24 : 0 : 24
Equation number 25 : 0 : 25
Equation number 26 : 0 : 26
Equation number 27 : 0 : Na
Equation number 28 : 0 : Nag
Equation number 29 : 0 : phian
Equation number 30 : 0 : 30
Equation number 31 : 0 : 31
Equation number 32 : 0 : xiax
Equation number 33 : 0 : xa
Equation number 34 : 0 : Dag
Equation number 35 : 0 : Tag
Equation number 36 : 0 : xagrow
Equation number 37 : 0 : Dang
Equation number 38 : 0 : Tang
Equation number 39 : 0 : xangrow
Equation number 40 : 0 : wa
Equation number 41 : 0 : Rak
Equation number 42 : 0 : 42
Equation number 43 : 0 : 43
Equation number 44 : 0 : 44
Equation number 45 : 0 : Yna
Equation number 46 : 0 : Pnag
Equation number 47 : 0 : Pnang
Equation number 48 : 0 : Ynag
Equation number 49 : 0 : Vnag
Equation number 50 : 0 : wnag
Equation number 51 : 0 : Rnaz
Equation number 52 : 0 : Rnagk
Equation number 53 : 0 : Ynang
Equation number 54 : 0 : Vnang
Equation number 55 : 0 : wnang
Equation number 56 : 0 : 56
Equation number 57 : 0 : Rnangk
Equation number 58 : 0 : 58
Equation number 59 : 0 : Kna
Equation number 60 : 0 : Knag
Equation number 61 : 0 : phinak
Equation number 62 : 0 : Zna
Equation number 63 : 0 : 63
Equation number 64 : 0 : 64
Equation number 65 : 0 : 65
Equation number 66 : 0 : 66
Equation number 67 : 0 : Nna
Equation number 68 : 0 : Nnag
Equation number 69 : 0 : phinan
Equation number 70 : 0 : xinax
Equation number 71 : 0 : xna
Equation number 72 : 0 : Dnag
Equation number 73 : 0 : Tnag
Equation number 74 : 0 : xnagrow
Equation number 75 : 0 : Dnang
Equation number 76 : 0 : Tnang
Equation number 77 : 0 : xnangrow
Equation number 78 : 0 : wna
Equation number 79 : 0 : Rnak
Equation number 80 : 0 : Y
Equation number 81 : 0 : K
Equation number 82 : 0 : Z
Equation number 83 : 0 : N
Equation number 84 : 0 : Ik
Equation number 85 : 0 : Iz
Equation number 86 : 0 : C
Equation number 87 : 0 : w

Without the mod file it is impossible to tell.

Thank you professor, this problem has been solved。